鍾經略醫生【皮膚科碩士 x 美容醫學碩士】課程研究
Dr Chung King Lueh's Aesthetic Medicine and Dermatology Case studies
地址 中環皇后大道中9號嘉軒廣場7樓
Whatsapp93424600電話 Tel 23630598（注 6）
Address: 7th floor, the Galleria, 9 Queen's Road Central, Hong Kong
10. What are the differences between mole removal at a beauty salon and by a medical professional?
Hygiene and environment: Many small beauty salons fall below standard hygiene requirements and lack proper sterilization equipment or supplies.
Training and qualifications: Most beauty salon staff have not received formal medical training.
Equipment and technique: Professional doctors usually use advanced laser technology for mole removal, while small salons may rely on outdated methods like corrosive chemicals, electrocautery or even cryotherapy.
Cancer screening ability: Qualified doctors can distinguish between ordinary healthy moles and malignant skin cancers—a critical step before any procedure.
Assessment of mole depth: Professional doctors assess how deep the mole's root extends before removal. A small or light colour mole does not necessarily mean it has a shallow root. If the root is deep, additional measures like suturing may be needed to minimize scarring.
Handling complications: Should an emergency arise during the procedure (e.g. excessive bleeding), a doctor is trained to respond immediately and appropriately.
Treatment in sensitive areas: For moles located near sensitive areas like the eyelids, lips and genitalia, medical professionals have the proper training, techniques and instruments to minimize risk.
In summary, aside from junctional nevi, the other two types of moles have deeper roots within the skin.
There’s also a type called the blue nevus, which is a mole with roots located very deep in the skin. Due to the extreme depth of the nevus cells and the way light is scattered and refracted, these moles appear blue to the naked eye. However, the roots themselves are actually dark black (not blue).
Additionally, there’s a type called red mole in Chinese , but this is actually a hemangioma—a vascular growth that contains no nevus cells—so it’s not classified as a mole. It is also called cherry angioma.
(Below is a typical blue nevus, which appears blue to the naked eye — HK$10,000)
(2) Squamous Cell Carcinoma – Signs and Symptoms:
A firm, red nodule or bump that doesn’t go away
A flat sore with a scaly crust, often mistaken for a non-healing wound
A new sore or raised area on an old scar or chronic sore
A rough, scaly patch on the lip that may become an open sore
A sore or rough patch inside the mouth
A raised, wart-like lesion on or near the genitals or anus
A brown spot that resembles an age spot
A horn-like growth (called a cutaneous horn) in rare cases
These lesions may itch, bleed, or feel tender, but sometimes they’re completely painless. SCC most often appears on areas frequently exposed to UV radiation—like the face, ears, neck, scalp, hands, and lips—but it can also develop in less obvious places, including the mouth, genitals, and under the nails
3. How are moles removed?
There are several methods for mole removal, including electrocautery, cryotherapy, chemical corrosion, CO2 laser cauterisation, and surgical excision.
Electrocautery involves using a fine, heated wire powered by electricity to touch the mole on the skin’s surface. The heat destroys the melanocytes (the mole cells) (essentially “burns” them off). However, this method can cause significant damage to the surrounding healthy skin (peripheral damage), resulting in scars that are often larger than the original mole. It's also difficult to control the depth of destruction—it often ends up being either too shallow or too deep. Because of this, using electrocautery for small moles can result in disproportionately large scars, and larger moles can’t be removed cleanly with this method.
Cryotherapy usually employs liquid nitrogen. It destroys the mole cells by freezing the affected area. However, it causes even more widespread damage around the target area and is even harder to control in terms of depth. Its only advantage is that it's more affordable than electrocautery. The claim of this treatment being less painful is actually not true.
Chemical corrosion involves applying acidic or alkaline solutions to destroy mole cells. This method generally leaves the most noticeable and extensive scarring, though it is the cheapest of all methods.
Laser removal is considered the most refined method today, albeit the most expensive. For cosmetic or aesthetic purposes, laser mole removal is typically preferred over the more primitive methods like electrocautery, cryotherapy, and chemical corrosion. However, laser removal is not suitable for malignant skin lesions (i.e., skin cancer)—in such cases, surgical excision is necessary.
For cosmetic/aesthetic mole removal (especially smaller moles), CO₂ laser (wavelength 10,600 nm) is the most commonly used. This laser is efficiently absorbed by water molecules, allowing it to vaporize the target tissue instead of burning it. The laser removes the mole cells layer by layer, right down to the root without burnt crusts being formed. Thanks to its excellent thermal coagulation, there’s no bleeding, allowing the root of the mole to be clearly visible during the procedure. This accuracy minimizes scarring—no overly deep wounds, and no incomplete removals due to insufficient depth.
Because the laser beam is highly focused, damage to the surrounding healthy tissue is minimal—unlike with electrocautery, corrosive chemicals, or cryotherapy, all of which tend to affect a larger area of nearby healthy skin and often result in wider, unsightly scars. Moreover, with those methods, it’s not possible to clearly visualise the mole’s root/mole cells during treatment, leading to wounds that are either too deep (scarring) or too shallow (leaving mole remnants behind).
Everything You Should Know About Mole Removal
— A Comprehensive Guide 2025
Students of Certificate course in Medical Technologies for Aesthetics Application (HKU SPACE)
Address of Practical lessons: 7th floor, the Galleria, 9 Queen's Road Central, Central, Hong Kong
Last update 12 June 2025
There are actually no difference between 'naevus' and 'mole'. Naevus is a medical term while mole is used by layman.
As for how these moles form, they can be either congenital (from birth) or acquired later in life. About 1% of melanocytic nevi are present at birth. Most of the moles appear after the age of two. For some people, the number of moles may increase rapidly during puberty. Individuals with a lot of moles often have a genetic predisposition. Acquired moles may also enlarge due to ultraviolet (UV) exposure. Other factors, like hormonal changes during pregnancy, can cause moles to darken as well.
1. What exactly are the moles on our skin? What's the difference between mole and naevus? How are they formed?
The medical term for mole on the skin is melanocytic naevus. They are essentially clusters and overgrowths of melanocytes—the cells responsible for producing pigment on skin. These melanocytes aren't black but the pigment that they produce is black. Because of the difference of the depth and density of the pigment, some moles appear darker, and others lighter. Some moles are flat, while others are raised.
They can appear anywhere on the body, including mucous membranes (such as the lips, genitals, anus, etc).
(3) Malignant Melanoma: signs and symptoms:
The ABCDE Rule
A – Asymmetry: One half of the mole doesn’t match the other.
B – Border: Edges are irregular, ragged, notched, or blurred.
C – Color: Uneven color with shades of brown, black, pink, red, white, or blue.
D – Diameter: Larger than 6 mm (about the size of a pencil eraser), though melanomas can be smaller.
E – Evolving: Any change in size, shape, color, or symptoms like itching or bleeding.
Other Warning Signs
A new mole or pigmented spot that looks different from others (the “ugly duckling” sign)
A sore that doesn’t heal
Spread of pigment from a mole into surrounding skin
Redness or swelling beyond the mole’s border
Changes in sensation—itching, tenderness, or pain
Changes in surface texture—scaliness, oozing, bleeding, or the appearance of a bump
Hidden Melanomas
Melanoma can also develop in less obvious places:
Under fingernails or toenails (as a dark streak)
On the palms, soles, or scalp
Inside the mouth, nose, genitals, or anus
Content
1. What exactly are the moles on our skin? What's the difference between mole and naevus? How are they formed?
2. How many different types of moles are there?
3. How are moles removed?
4. What should you be aware of after mole removal? How can you prevent the formation of moles?
5. Why should mole removal be done by a qualified doctor?
6. What’s the relationship between a mole and skin cancer? How many types of skin cancers are there, and how does a doctor make a diagnosis?
7. What kind of specialist should you consult for mole removal? Who’s considered an expert on mole removal in Hong Kong?
8. What are the complications of mole removal? How can they be prevented? How are these complications treated?
9. How much does mole removal cost?
10. What are the differences between mole removal at a beauty salon by a therapist and at a clinic by a medical professional?
11. What are the over-the-counter mole remover (mole removal cream)? Are they safe?
12. Are there certain parts of the body or face where mole removal should only be performed by a doctor?
13. Can Hong Kong doctors advertise?
14. Is there a difference between mole removal for men and women? And what about children versus adults?
15. Is mole removal covered by medical insurance? If a doctor performs the procedure, does that make it claimable?
16. What are the risks if mole removal is performed by practitioners without medical training?
Another type of laser used for mole removal is the Er:YAG laser (wavelength 2940 nm). However, it’s generally considered less effective than the CO₂ laser. The Er:YAG laser has less penetrating power, which makes it harder to reach the deeper part of the mole. Because of this limitation, it's not as commonly used.
5. Surgical excision involves cutting out the mole with scalpel. During the procedure, the amount of normal tissue removed depends on the nature of the lesion. For benign tumors, only a small margin of healthy tissue is removed. For malignant lesions, a wider margin of surrounding tissue is taken. Since the area removed is larger than the mole, the resulting wound and scar are larger, and usually not very aesthetically pleasing.
In certain types of malignant skin cancers, even more surrounding tissue must be excised, resulting in an even bigger scar. The removed tissue is sent for histopathological analysis to determine the exact type of skin tumor, which then guides further treatment. For benign moles, surgical excision typically has the lowest recurrence rate of all removal methods.
(The following three photos show the process of surgical mole excision — HK$18,000)
2. How many types of moles are there?
Moles are categorized based on the depth at which the mole cells (melanocytes) reside within the skin. Simply put, it's classified according to how deep the "root" of the mole extends.
Our skin is made up of three layers: the epidermis (outer layer), the dermis (middle layer), and the subcutaneous tissue (deepest layer).
(Following is a histological diagram of the structure of skin)
5. Why should mole removal be done by a qualified doctor?
You often see advertisements from beauty salons claiming “painless mole removal” and “scar-free results,” making the procedure sound incredibly simple—as if an 'experienced' aesthetic technician can perform it flawlessly.
But here’s why seeking a licensed medical doctor is crucial:
First, a professional doctor can accurately diagnose whether a mole is benign or potentially malignant. If a skin cancer is mistakenly treated as a harmless mole and removed with laser, the cancerous cells could continue to spread, grow and even metastasize to other organs. This can become life-threatening.
Second, moles with deeper roots results in deeper wounds, which may require special aftercare. After laser removal of larger moles, stitching may sometimes be necessary to close the very deep wound. Doctors with proper medical aesthetic training (eg MSc Aesthetic Medicine QMUL) are far better equipped to handle such cases than non-medical personnel in beauty salons. If the wound isn’t properly treated and becomes infected, the resulting scar can end up looking much worse than the original mole. In that case, the risks far outweigh any perceived benefit.
Third, you can hardly verify the qualifications and experience of the 'experienced' aesthetic technician who operates on you.
1. The first type is junctional nevus, which is the most superficial type of mole—meaning its "roots" lie closer to the surface. The nevus cells grow between the epidermis and the dermis layers of the skin. Because the cells are located near the surface, these moles are usually flat, small, and tend to appear darker in color.
(Below is how typical junctional nevi look — HK$3,900 x 3 = HK$11,700)
About the author:
Dr Chung has been practising Aesthetic Medicine in Hong Kong for more than 20 years.
This is course material prepared for the 'Certificate course in Medical Technologies for Aesthetics Application (HKU SPACE)' with reference to MSc Aesthetic Medicine (QMUL) course
6. What’s the relationship between a mole and skin cancer? How many types of skin cancer are there, and how does a doctor make a diagnosis?
Very often, early stage skin cancers don’t look very different from ordinary moles. But a trained doctor can distinguish between benign and malignant lesions. Clinical studies show that the more moles you have, the higher the risk of you developing melanoma—a risk influenced by both genetics and heredity.
There are three main types of skin cancer commonly seen in Hong Kong:
1. Basal cell carcinoma (BCC) – the most common.
2. Squamous cell carcinoma (SCC) – the second most common.
3. Melanoma – the rarest among the three, but the most deadly.
Many people have heard of the “ABCDE” rule for diagnosing skin cancer, but it's mainly used to identify melanoma, the rarest form.
(1) Basal Cell Carcinoma – Symptoms: These tumors tend to be round, shiny, and translucent, often with fine blood vessels visible on the surface. In fair-skinned individuals, the growth may appear pearly white or pink. On darker skin, the same lesion may appear brown or glossy black. Although visible blood vessels can occur in all skin tones, they may be harder to detect on darker skin. These growths can also bleed or scab, and sometimes have raised, translucent edges.
(The five images that follow are cases of basal cell carcinoma, which is very common in Hong Kong. To an untrained eye, these cancers can look remarkably similar to ordinary moles, making them easy to overlook.)
11. What are the over-the-counter mole remover (mole removal cream)? Are they safe?
Over-the-counter mole removal creams often contain strong alkaline or acidic substances, most commonly calcium oxide (quicklime) or sodium hydroxide. These agents are corrosive and can cause irreversible damage to the skin, causing ugly scars.
Reported Dangers:
In December 2023, Japan’s Consumer Affairs Agency reported multiple cases of severe skin damage from people using mole removal creams purchased online. Victims experienced symptoms such as skin discoloration, ulceration, and chemical burns—some requiring over a year of treatment. A 70-year-old woman developed a festering forehead wound, while another user described a painful burning sensation after applying the product, later needing long-term medical care.
In 2016, Ming Pao (Hong Kong) reported that many shops in Mainland China falsely claimed to offer "natural" mole removal treatments for just 10 RMB. But insiders revealed that the products that they use were actually highly corrosive chemicals disguised as herbal remedies. A practitioner in Shenzhen admitted these so-called traditional remedies were made from chemicals that burn off the skin.
An article published in Journal of clinical and aesthetic dermatology identified 38 cases in the year 2019 - 2021 in which patients sustained burns, pain, and ulceration, resulting in permanent scarring and disfigurement after using unapproved mole remover containing ingredients included salicylic acid and calcium oxide etc. Treatments included antibiotics, hospital care, wound care, and dermatology advice to have a skin graft.
Additionally, poor hygiene and reusing needles for mole removal, increase the risk of infection and disease transmission.
Bottom line: Using unregulated mole removal creams is extremely risky. Not only can they cause scarring, infection, and disfigurement—they may even lead to misdiagnosed or worsened skin cancers if not properly assessed by a medical professional.
15. Is mole removal covered by medical insurance? If a doctor performs the procedure, does that make it claimable?
In general, laser mole removal for cosmetic purposes is not covered by medical insurance in Hong Kong.
However, charges of mole removal may be claimable if it’s done for medical reasons. For example, if the mole causes itching, pain, swelling and it has unclear borders, abnormal color, and persistent ulceration then a doctor may recommend a complete surgical excision (not laser) and send the specimen for histopathological examination to rule out malignancy. In such cases, insurance claims may be accepted.
Importantly, the procedure must be performed by a registered doctor in a medical clinic (but it doesn’t have to be a dermatologist). Treatments done at beauty salons—even by doctors they hire—are much less likely to qualify for insurance coverage.
13. Can Hong Kong Doctors Advertise for themselves?
Yes—doctors may advertise, but their claims must be truthful, evidence-based, and non-misleading and this is protected by the Basic Law of the Hong Kong SAR.
Doctors can share mole removal case studies online. If a doctor posts only a few cases, it's likely because he doesn't have many—not due to regulation that limits the number of cases that he can post.
16. What are the risks if mole removal is performed by practitioners without medical training?
Bleeding: An untrained person may not even know how to stop active bleeding during or after the procedure.
Anesthesia concerns/risks: In Hong Kong, topical anesthetic creams are classified as Part 1 poisons. Under the Pharmacy and Poisons Ordinance, only registered doctors (or licensed pharmacists under supervision) may obtain or use anesthetic cream with medical grade concentration. Using them without authorization is illegal and may result in a HK$10,000 fine or up to two years in prison. Overdose of topical anaesthesia (eg lidocaine), in severe cases, includes muscle tremors, seizures, respiratory depression, unconsciousness, coma, and cardiac depression.
Infection risk: Without sterile technique, improper tool handling can lead to wound infection and scarring.
Severe injury: Even with sterile instruments, an unqualified person might accidentally cut a major artery (e.g., carotid artery), causing unstoppable bleeding—or sever a major nerve (e.g., facial nerve, trigeminal nerve), potentially resulting in facial paralysis.
Illegal practice: Performing medical procedures without a license may result in criminal charges for practicing medicine unlawfully.
Materials prepared for the Certificate course in Medical Technologies for Aesthetics Application (HKU SPACE)
Credit also goes to and refers to MSc Aesthetic Medicine (QMUL)
Address of classroom: Admiralty Learning Centre, 2/F & 3/F, Admiralty Centre, 18 Harcourt Road, Hong Kong
14. Is there a difference between mole removal for men and women? And what about children versus adults?
Mole removal in men and women is quite similar. The likelihood of scarring depends primarily on the mole’s depth, width, and the patient’s skin type. However, expectations often differ—many women are less accepting of scarring than men, making expectation management especially important before the procedure. Women should be given more time and clearer information regarding potential scarring.
As for children, the same care and expectation management apply. Parents need adequate time to consider the possible complications. If a child is willing, earlier removal is better, since waiting until a mole grows larger will result in a more noticeable scar.
9. How much does mole removal cost?
Prices for mole removal vary greatly depending on the technique, location, facilities and the qualifications and experience of the practitioner.
Taking a small mole as an example:
Mainland China street stalls: Around RMB 5–10 per mole. Often uses corrosive chemicals or electrocautery.
Small beauty salons in Hong Kong: Staff usually lack medical training and have under two years of experience. The environment is not very hygienic. Relatively low-grade techniques like corrosive solutions are being used. Cost: HK$20–80 per mole.
Medium-sized beauty salons in Hong Kong: Better environment, staff with over two years’ experience, using relatively more advanced techniques (e.g. electrocautery). Cost: HK$100–300 per mole.
Large beauty salons in Hong Kong: Staff usually has no formal medical training. They have attractive settings with luxurious decor. Staff relatively more experienced (over five years), often using laser machines. Cost: Typically HK$400–800 per mole. If the salon has employed a doctor (who may not have much experience) then the cost will be around $1000 per mole.
As for licensed doctors:
Neighborhood clinics (GP clinic located within or near housing estates): Usually charge a few hundred per mole
Doctors in Central: Prices often start from HK$2,000 per mole (not including consultation). For dermatology specialists in Central, it’s typically HK$2,000–4,000 and up. If the charge seems unusually low, be sure to verify if the specialist has experience with mole removal. There are some dermatologists in Central who simply don't perform any laser mole removal.
Plastic surgery specialists: Often start at HK$5,000–10,000. For large moles requiring surgical excision the charge will be much more expensive.
Important notes:
Not all dermatologists offer mole removal or are trained in it.
It's wise to call ahead before booking a consultation to confirm such mole removal service is available.
In Hong Kong, dermatology fellowship training (specialist training) does not typically include mole removal for cosmetic purposes.
Aesthetic medical training for doctors are now available, not in Hong Kong but in the UK eg MSc Aesthetic Medicine (QMUL)
The best way to find a qualified mole removal doctor is to research the cases that they have done. Qualifications claimed by doctors and their online reviews are often misleading. Results speaks for themselves.
7. What kind of specialist should you consult for mole removal? Who’s considered an expert on mole removal in Hong Kong?
Most people assume that dermatologists and plastic surgeons have the most experience with mole removal.
In Hong Kong, training in this area is relatively limited. Given the city’s highly constrained medical resources, most public healthcare funding is directed toward treating illness—not aesthetics. Mole removal for cosmetic reasons is rarely performed in public hospitals.
Because of this gap in specialist training, most doctors only gain experience with mole removal after entering the private sector.
So in private sector, which specialty performs more cosmetic mole removal surgeries? Aesthetic medicine, dermatology, or plastic surgery? Well, this is hard to tell. In fact, some dermatologists in Hong Kong don’t perform mole removal at all.
Your best bet? Look at the doctor’s cases posted on-line. These reflect the doctor’s hands-on experience. It is illegal for a doctor to post photoshopped clinical photos on-line in their websites or use them in journal articles.
As for online reviews, don’t rely on them too heavily—they can be misleading. A large number (hundreds) of five-star reviews is often a result of paid feedback. It is not illegal to buy 'reviews' in Hong Kong.
In short: judge a doctor by their actual work. Look at their case presentations. The results don’t lie.
8. What are the complications of skin mole removal? How can they be prevented? How are these complications treated?
1. Scarring: Some degree of scarring is expected. The extent depends on the removal method, mole size and depth, and skin type. Generally speaking, scars on the face tend to be sunken (atrophic) while those on the body are raised (hypertrophic/keloid)
2. Infection: Redness, swelling, pus, and tenderness signal infection. Keeping the wound clean and dry is important to prevent infection.
3. Bleeding or hematoma: Especially if you're on blood thinners eg aspirin and warfarin, or the mole is in a highly vascular area eg eyelid and lip.
4. Incomplete removal: The mole may regrow if its root wasn’t fully removed.
5. Pigmentation changes: The treated area may become darker (hyperpigmentation) or lighter (hypopigmentation), especially in people with darker skin tones.
6. Nerve damage: Rare, but possible if the mole is near a nerve. This can lead to numbness or tingling sensation.
7. Allergic reactions: To anaesthetics, topical ointments, or adhesives used during the procedure.
8. Masking of skin cancer/misdiagnosis:
If a mole is removed without medical evaluation, it could delay the diagnosis and treatment of skin cancer.
How can these complications be prevented and treated?
1. Prevention is key—discuss the procedure thoroughly with an experienced doctor beforehand, as proper planning can reduce the chances of these complications.
2. Follow doctor's instructions for wound care, including keeping the area clean and covered.
3. Avoid sun exposure on the healing site.
4. Avoid picking at scabs or using harsh chemicals on the wound.
5. Report any signs of infection, excessive bleeding, or other concerning symptoms to your doctor immediately. He may prescribe antibiotic to you to treat infection. He will also treat any allergic reactions with oral and topical medication. Excessive bleeding can be prevented or treated with suturing of the wound properly.
6. Incompletely removed moles should be treated as soon as possible.
7. Consider using silicone sheets or other scar treatments to minimize scarring.
8. For very resistant keloid scars, we can consider the following options:
a. Steroid injections to reduce size
b. Laser therapy to lessen redness
c. Cryotherapy to shrink the scar
d. Surgical excision followed by radiation therapy to prevent recurrence
e. Consider immunotherapy in very stubborn cases.
There are also rare but serious complications. For example, if a mole on the eyelid is treated improperly with laser, it could result in permanent vision damage. In such cases, referral to an ophthalmologist is essential. But with the right precautions, this type of incident is entirely preventable.
Laser mole removal has a higher recurrence rate compared to surgical excision, but in the hands of an experienced doctor, over 90% of cases can be fully cleared in a single session. Laser removal results in smaller wounds because it causes minimal damage to surrounding tissue. These small wounds typically form a scab within a few days, which falls off after one or two weeks.
After the scab sheds, the newly healed skin often appears pink or brown, a condition known as post-inflammatory hyperpigmentation. People with darker skin tones may experience more noticeable pigmentation, and it may last longer. In most cases, this pigmentation fades without treatments over time, though in rare instances it can become permanent.
In some cases, if the wound is very deep, the resulting scar may be depressed. Sometimes, a scar may become raised, and this is known as hypertrophic scarring or keloid scarring.
(The following image shows the results of laser mole removal.)
12. Moles located on which parts of the body/face should ideally be removed by a doctor?
In fact, moles located on many parts of the body and face should ideally be removed by a medical professional. Staff of beauty salon lack experience dealing with moles in these more complex or sensitive areas. And it’s not just salon staff—even medical doctors, may it be specialist or not, may not have experience with mole removal in certain anatomical locations.
That's why it’s crucial to consult the doctor you've chosen, ask if they’ve previously removed moles in that specific area, review their cases, and listen to their professional advice and opinions before making a decision.
It’s not always about the size of a mole. The location of the mole is sometimes even more important.
Here are examples of such moles that i don't recommend a beauty salon staff to remove. Please do consult an experienced doctor.
The followings are the moles removed by Dr Chung
2. The second type is dermal nevus, also known as an intradermal nevus. These moles tend to be lighter in color, and their roots generally lie deeper within the skin. That’s because the nevus cells are located in the deeper layer of the skin—the dermis or even beneath it. Since the outer skin layer (the epidermis) lies above these pigmented cells—and because the epidermis itself is semi-transparent—the mole often appears lighter or, in some cases, colorless.
These lighter or colorless moles are usually raised above the skin surface, and sometimes have hair growing from them.
(Below is how a typical intradermal nevus looks)
4. What should you be aware of after mole removal? How can you prevent the formation of moles?
Whether you’ve had a mole removed by laser or through surgery, post-procedure wound care is very important. The wound should be kept clean and dry, and contact with water should be avoided. Proper scab formation results in fast healing and small and aesthetically pleasing scars.
Some people overcomplicate things by mimicking hospital-grade wound care—using wet dressings or sealing the area tightly with adhesive dressings. This can actually hinder scab formation. When a wound is covered air-tight, secretions from the skin surface (eg sweat and sebum) can enhance bacteria growth, greatly increasing the risk of infection. What would normally heal in a week can become unnecessarily prolonged. In fact, scabbing helps reduce the risk of infection by acting as a natural waterproof barrier against bacterial invasion.
It’s important to note that hospital wound-care practices are designed for large burn or scald wounds—injuries that damage the skin down to the dermis or even deeper. Such wounds can cause significant fluid loss and disrupt electrolyte balance, which can be dangerous. In those cases, moist coverings like wet gauze are used to slow evaporation and promote rehydration and healing.
However, for small outpatient procedures done under local anaesthesia, such wound care is unnecessary. The best dressing for such wounds is often a simple, breathable adhesive bandage. Change it daily, and replace it immediately if it gets wet or dirty. If the wound is deeper or wider, a doctor may prescribe oral antibiotics to prevent infection.
Avoid direct sun exposure to the wound/scar to reduce the risk of post-inflammatory hyperpigmentation. A doctor might also prescribe scar-reducing ointments after the procedure to minimize the chances of raised or sunken scars.
3. The third type is compound nevus. This type of mole usually has deeper roots and is a combination of a junctional nevus and a dermal (intradermal) nevus. It tends to appear darker than a dermal nevus because some of the nevus cells are located closer to the skin surface. Meanwhile, other nevus cells are found deeper within or below the dermis. Sometimes these moles have hairs growing from them.
(Below is how a typical compound nevus looks — HK$20,000)
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