Effective Solutions for Dark Skin Patches: Dermatologist Tips
Skin issues Hello, doctor. I have darkened skin on both sides of my groin that cannot be washed off. I would like to ask if there are any medications or methods available to remove it.
Dr. Zheng Lizhen Reply:
Tinea corporis, hyperpigmentation, and acanthosis nigricans could all potentially cause this phenomenon. It is recommended that you consult a nearby dermatologist for an accurate diagnosis and treatment.[Read More] Effective Solutions for Dark Skin Patches: Dermatologist Tips
Effective Remedies for Insect Bites and Skin Care in Teens
My skin Hello! I am 14 years old. I don't go out often, but my calves are frequently bitten by mosquitoes or insects. Sometimes I apply alcohol, baby oil, and medications (Sebo De Matcho, Terramycin), but they don't seem to help, meaning I still get bitten. Is this an a...
Dr. Zheng Lizhen Reply:
Reactions to mosquito bites vary from person to person. It is advisable to avoid scratching to prevent secondary bacterial infections, as this could prolong the healing process. It is best to consult a dermatologist for appropriate treatment. To reduce post-inflammatory hyperpigm...[Read More] Effective Remedies for Insect Bites and Skin Care in Teens
Understanding Cheekbone Nevi: Causes, Treatments, and Prevention Tips
Zygomatic nevus Is a chloasma (melasma) a type of sunspot? What is the difference between chloasma and dark spots? Will chloasma increase in number over time? I have relatively fair skin; will more spots develop after ruby laser treatment? Are there dietary therapies that can hel...
Dr. Zheng Lizhen Reply:
The correct medical term for zygomatic nevus is "acquired bilateral dermal melanosis" or "late-onset bilateral Ota's nevus." Following the publication of dermal melanosis by Japanese physician Dr. Ota in 1939, researchers gradually observed this type of d...[Read More] Understanding Cheekbone Nevi: Causes, Treatments, and Prevention Tips
Effective Treatments for Scars and Dark Spots on Skin
Scars / Hyperpigmentation Hello, doctor. About 5 to 6 years ago, I had symptoms similar to eczema on my legs, which included redness, swelling, small blisters, and itching. I may have scratched the blisters at that time, resulting in very noticeable dark scars on my legs today. I...
Dr. Zheng Lizhen Reply:
To remove hyperpigmentation, you can use whitening skincare products containing vitamin C derivatives, L-ascorbic acid, alpha hydroxy acids, kojic acid, or arbutin. Additionally, dermatologists may prescribe medications containing hydroquinone, azelaic acid, or retinoids based on...[Read More] Effective Treatments for Scars and Dark Spots on Skin
Differences Between Ruby and Alexandrite Lasers for Skin Treatments
Laser What are the differences between ruby laser and alexandrite laser? Which one is most effective for treating pigmented lesions? Which laser is more advanced?
Dr. Zheng Lizhen Reply:
The difference between ruby laser and jadeite laser lies in the medium used for laser excitation; one uses ruby while the other uses jadeite, resulting in the emission of different wavelengths of light for medical purposes. Both can be used to treat hyperpigmentation and freckles...[Read More] Differences Between Ruby and Alexandrite Lasers for Skin Treatments
Expert Answers to Common Dermatology Questions: Acne, Vitamin C, and More
Consultation Inquiry Hello, doctor. I hope you don't mind answering my questions. Question 1: Is ice therapy effective for acne? Question 2: There was a report in the "Common Health" magazine about the remarkable effects of Isdin's Dehydroascorbic Acid (Vi...
Dr. Zheng Lizhen Reply:
1. When acne is severely inflamed, you can first apply a cold compress locally to alleviate redness, swelling, and pain, and consult a dermatologist for treatment. 2. Unclear. 3. No. 4. Currently, products like retinol and aldehyde are less likely to cause irritation and photosen...[Read More] Expert Answers to Common Dermatology Questions: Acne, Vitamin C, and More
Effective Foods and Medications to Reduce Skin Pigmentation
What medications or foods can help lighten melanin? My legs have hyperpigmentation, and I am currently applying medication, but the doctor said it will take a long time to improve. I wonder if the doctor knows of any foods or medications that can help lighten the hyperpigmentatio...
Dr. Zheng Lizhen Reply:
The color of the melanin deposition left after inflammation typically fades gradually over time (approximately three to six months). Using whitening products and sunscreen, along with a diet rich in vitamin C, can help accelerate the fading process.[Read More] Effective Foods and Medications to Reduce Skin Pigmentation
Understanding Glycolic Acid Peels: Benefits, Costs, and Results
Alpha hydroxy acid (AHA) chemical peel Dear Doctor, what is glycolic acid peeling? How much does it typically cost for one session? Will the skin become whiter after the peeling? Thank you!
Dr. Zheng Lizhen Reply:
Alpha hydroxy acid (AHA) peels are currently effective in treating acne, hyperpigmentation, and superficial wrinkles. It is recommended to first consult with your dermatologist for a diagnosis before deciding whether to undergo AHA peeling. The cost varies by hospital or clinic, ...[Read More] Understanding Glycolic Acid Peels: Benefits, Costs, and Results
Does Fruit Acid Thin Your Skin? Insights on Acne and Side Effects
Does alpha hydroxy acid thin the skin? Hello, doctor. 1. I have seen online that some users experienced thinning and sensitivity of the skin after using alpha hydroxy acids (AHAs). Is this a real possibility? 2. Can the use of AHAs improve the appearance of acne scars? 3. W...
Dr. Zheng Lizhen Reply:
1. After an alpha hydroxy acid (AHA) peel, it is the stratum corneum that becomes thinner, not the entire skin. On the contrary, the epidermis may actually thicken. Therefore, the notion that the skin becomes thinner after an AHA peel is fundamentally incorrect; those who claim t...[Read More] Does Fruit Acid Thin Your Skin? Insights on Acne and Side Effects
Understanding Wound Healing: Tips for Faster Recovery and Scar Reduction
Wound healing I injured my knee a few days ago in a motorcycle accident, and although it has been some time, it hasn't scabbed over and occasionally oozes. Is there any relation to this? Typically, how long does it take for a wound to form a scab? Also, the scar from last ye...
Dr. Zheng Lizhen Reply:
1. The wound has been present for a while without scabbing and occasionally oozes, indicating a possible bacterial infection. It is recommended that you consult a dermatologist for an accurate diagnosis and treatment. 2. Scars left after an injury are classified into "true...[Read More] Understanding Wound Healing: Tips for Faster Recovery and Scar Reduction
Overcoming Acne Scars: Regaining Confidence in Your Skin
Lack of confidence..? Hello doctor: During my puberty, I developed acne and blackheads on my face, and I often squeezed them with my hands. As a result, I have many shallow scars and small red lines on my face (which look like a cluster of broken capillaries). Additionally, I hav...
Dr. Zheng Lizhen Reply:
Acne scars can be classified into "true scars" (atrophic or hypertrophic scars) and "false scars" (erythema or hyperpigmentation). True scars, particularly atrophic scars, can be treated with dermabrasion; currently, most procedures use laser resurfacing, whic...[Read More] Overcoming Acne Scars: Regaining Confidence in Your Skin
Understanding Adult Acne vs. Teen Acne: Tips for Fading Scars
I'm sorry What are the differences between adult acne and adolescent acne? How can acne scars be lightened?
Dr. Zheng Lizhen Reply:
What you refer to as adult acne is likely "late-onset acne." This term is used to avoid the common misconception that acne, often referred to as "teenage acne," only affects adolescents. In reality, acne is not exclusive to teenagers. The main causes of late-o...[Read More] Understanding Adult Acne vs. Teen Acne: Tips for Fading Scars
Effective Scar Removal for Acne Marks: Student-Friendly Solutions
Scar removal What are the most effective methods for removing acne scars caused by squeezing, and which options are suitable for students?
Dr. Zheng Lizhen Reply:
Acne scars can be classified into "true scars" (atrophic or hypertrophic scars) and "false scars" (erythema or hyperpigmentation). True scars, particularly atrophic scars, can be treated with dermabrasion; currently, most procedures utilize laser resurfacing, ...[Read More] Effective Scar Removal for Acne Marks: Student-Friendly Solutions
Understanding AHA Peels: Side Effects, Costs, and Safety Concerns
Regarding alpha hydroxy acid (AHA) peels? I would like to ask if there are any side effects after undergoing a chemical peel with alpha hydroxy acids (AHAs)? For example, redness, etc. I've seen classmates who had their faces burned after the procedure, which is quite scary....
Dr. Zheng Lizhen Reply:
Glycolic acid peels have shown good results in the treatment of acne, hyperpigmentation, and superficial wrinkles. It is recommended to first consult with your dermatologist for a diagnosis before deciding whether to undergo a glycolic acid peel. The cost varies by clinic, genera...[Read More] Understanding AHA Peels: Side Effects, Costs, and Safety Concerns
Understanding Red and Black Acne Scars: Treatment and Care Tips
Red and black acne scars? I have a question for the doctor. Recently, I visited a dermatologist for acne scars, and the doctor prescribed a yellow ointment for me to apply (it looks like tretinoin). He instructed me to apply it to the areas with acne and red or dark pigmented sca...
Dr. Zheng Lizhen Reply:
Applying tretinoin can indeed improve acne and hyperpigmentation. After application, it may cause peeling due to the exfoliation of the skin. It is important to apply a "thin layer" at "night" to allow for mild peeling, which yields the best results. If peelin...[Read More] Understanding Red and Black Acne Scars: Treatment and Care Tips
Dealing with Persistent Acne: When to See a Dermatologist?
Acne issues Hello, doctor. My skin is generally neutral; it tends to be slightly dry in winter and slightly oily in summer, and it is somewhat sensitive. For many years, I have had a small number of persistent acne lesions (fewer than ten), which have also left some post-inflamma...
Dr. Zheng Lizhen Reply:
If the number of acne lesions is not significant and the inflammation is mild, it may be sufficient to use topical medications. However, this does not mean that seeing a dermatologist is unnecessary! The physician can adjust the treatment based on the current condition and provid...[Read More] Dealing with Persistent Acne: When to See a Dermatologist?
Understanding Skin Hyperpigmentation: Causes and Solutions for Darkened Areas
Pigmentation deposition Five years ago, I noticed darkening between my armpits and wrists, but the pigmentation in my armpits has not improved. I have been plucking hairs one by one with tweezers. I have heard that plucking too forcefully can cause irritation and lead to pigmenta...
Dr. Zheng Lizhen Reply:
Pigmentation in the armpits may be indicative of "acanthosis nigricans." There are many potential causes for acanthosis nigricans, including genetics, hormonal factors, obesity, diabetes, and medications. It typically occurs in skin folds and presents as a brownish-blac...[Read More] Understanding Skin Hyperpigmentation: Causes and Solutions for Darkened Areas
Struggling with Persistent Acne: Effective Treatments and Solutions
My face is covered in acne, and I'm going crazy? I frequently develop acne in the same areas, particularly on my cheeks and chin, while small pimples on my forehead can be itchy and sometimes appear in clusters. The blackheads on my nose are difficult to remove, and my skin ...
Dr. Zheng Lizhen Reply:
L-ascorbic acid can help accelerate the fading of post-inflammatory hyperpigmentation after acne, but acne still needs to be properly treated. Yulian has many blackheads, so it is important to maintain facial cleanliness. In addition to washing the face, topical products such as ...[Read More] Struggling with Persistent Acne: Effective Treatments and Solutions
Understanding Post-Laser Pigmentation: What You Need to Know
Post-laser hyperpigmentation..? Hello doctor, I developed faint dark spots on my arm during the fourth and fifth grades of elementary school, which have been a long-term concern for me. Since the area is quite large, I underwent laser treatment in late June in Pingtung, but it re...
Dr. Zheng Lizhen Reply:
Post-laser pigmentation is not only a source of distress for patients but also a significant concern for dermatologists. This issue is closely related to the patient's constitution, the treatment method, the type and dosage of the laser used, post-procedure wound care, and s...[Read More] Understanding Post-Laser Pigmentation: What You Need to Know
Understanding Dermabrasion: Process, Costs, and Recovery Time
The process and cost of dermabrasion surgery? Hello, doctor~~~ I have been experiencing acne since the sixth grade, and naturally, this has left scars over time. Now at the age of twenty-two, which is a time when girls are particularly concerned about their appearance, I often fe...
Dr. Zheng Lizhen Reply:
Acne scars can be classified into "true scars" (atrophic or hypertrophic scars) and "false scars" (erythema or hyperpigmentation). True scars, particularly atrophic scars, can be treated with dermabrasion, with most procedures now utilizing laser resurfacing. ...[Read More] Understanding Dermabrasion: Process, Costs, and Recovery Time