Acne, Dermatology FAQ

Understanding Groin Itching: Causes and When to See a Specialist

Groin itching Doctor, I often experience itching in my groin area, and recently I've noticed that the itchy area has a semicircular dark appearance. Additionally, both of my legs are affected. Could this be tinea cruris? Also, I have small white bumps on my scrotum that rese...

Dr. Hong Zhengsheng Reply:
Hello: In your message, you mentioned: "I often experience itching in my groin area... Recently, I noticed that the itchy area appears as a semicircular dark patch... and it is symmetrical on both legs... Could this be tinea cruris?" → Tinea cruris, eczema, localized hy...

Understanding the Strength and Effects of Mandelic Acid Peels

Excessively acidic skin exfoliation? Is there a concentration grading system for mandelic acid peels similar to that of glycolic acid peels? Will mandelic acid peels cause an initial worsening of acne like glycolic acid peels? Is there a significant price difference between acne ...

Dr. Jiang Zheen Reply:
Salicylic acid peels have only one concentration, and their irritancy is relatively low, which means they are less likely to exacerbate acne in the initial stages. The cost of intense pulsed light (IPL) treatments can vary, so it may be beneficial to inquire at multiple clinics.

Laser vs. Intense Pulsed Light: Which is Better for Acne Treatment?

Laser In the past few days, I have been considering undergoing laser or intense pulsed light (IPL) treatment for acne. When I inquired at the clinic, the doctor mentioned that both options could be suitable for my current condition and advised me to think it over. I would like to...

Dr. Jiang Zheen Reply:
Theoretically, the treatment of acne primarily involves topical and oral medications. Laser and intense pulsed light (IPL) therapies mainly target post-acne pigmentation or scarring. Generally, IPL is milder and has a slower effect, and both treatments are not very suitable for a...

Why Exfoliating Your Face Can Trigger Acne: Causes and Solutions

Facial exfoliation Doctor, why do I get acne after exfoliating? Could it be because the acne is being metabolized out? Are there any diagnostic tools or methods to identify the causes of acne for acne-prone skin?

Dr. Hong Zhengsheng Reply:
Hello, The possible causes of acne include the following points (provided by the Taiwan Dermatological Association): 1. Genetics: This is a matter of individual constitution. 2. Overactive sebaceous glands: Patients may have oily skin on their faces. 3. Hormonal imbalance: ...

Managing Acne and Allergies: Skincare Tips for Sensitive Skin

Prone to allergies and acne? Hello, doctor. I have sensitive skin that is prone to allergies, and my facial skin is very thin with prominent blood vessels. Therefore, I chose to use a soothing product line. However, I have noticed that while I do not experience allergic reactions...

Dr. Jiang Zheen Reply:
You can try using mandelic acid peels or alpha hydroxy acid peels to improve your acne issues. As for freckles, you can apply trichloroacetic acid solution at a dermatology clinic, or consider laser treatment. However, freckles can easily recur, so it is essential to practice tho...

Understanding the Metabolism of Acne Treatments: Myths and Facts

The metabolic phenomenon of skincare products? Some acne treatment products, such as alpha hydroxy acids (AHAs), may cause an initial increase in breakouts during the early stages of use. Is this an actual metabolic phenomenon, or is it simply due to the product being unsuitable ...

Dr. Jiang Zheen Reply:
It is indeed common to experience an increase in acne during the initial stages. This is not a cause for concern. Most products that claim to be oil-free and emulsifier-free are effective in preventing acne; however, some individuals may have unique skin types that do not respond...

Effective Treatments for Painful Scalp Acne: Expert Advice

Dermatology Hello, I have many large pimples on my scalp that cause a stinging sensation and have not healed for a year. I also experience dry mouth and tongue. If I accidentally consume spicy or hot foods, the stinging sensation worsens. I often take Huanglian (Coptis chinensis)...

Dr. Huang Ruiyun Reply:
I'm sorry, but online diagnosis and prescribing are not permitted. Acne is a condition related to individual physiology and requires long-term monitoring and treatment. It is recommended that you consult a nearby dermatologist for your treatment.

Understanding Post-Inflammatory Hyperkeratosis: Causes and Treatments

I'm not sure if it's a scar? Hello, doctor... I have some inflamed acne on my face, but after they healed, they feel hard to the touch. I saw a doctor who said it was due to keratinization caused by previous inflammation. The symptoms have persisted for a year. I heard ...

Dr. Jiang Yujiao Reply:
Hello: In response to your question, if the previous physician has made a diagnosis that requires injecting a substance into the hardened lesions, it is likely fibrotic tissue, scar tissue, or keloids resulting from inflammation.

Managing Post-Laser Care: Redness, Sunscreen, and Rosacea Solutions

Red scars, sun protection, and rosacea concerns? Dr. Jiang... I accidentally came across this website, haha~ Happy New Year! Last Wednesday, I had laser treatment for spots at the clinic. You prescribed me an ointment and artificial skin... I would like to ask you, how long shoul...

Dr. Jiang Yujiao Reply:
Hello: In response to your question, it is normal to experience some itching and redness after laser treatment. Some individuals may also have an itchy reaction to artificial skin; in such cases, you can switch to ointments or restorative skincare products. When taking isotretino...

Managing Keloids: Effective Treatments and Personal Experiences

Challenging keloids It's really frustrating to talk about. After the New Year last year, I had surgery on my abdomen, which left a surgical scar. I know I have a tendency to develop keloids. I've taken good care of it (using silicone gel sheets) and have tried over-the-...

Dr. Jiang Yujiao Reply:
Hello: In response to your question, in addition to injections, keloids can also be treated with cryotherapy using liquid nitrogen, which has shown good results. Scars that develop after surgical excision can also turn into keloids unless the dermatologist employs additional meth...

Understanding the Causes of Acne: Can Biopsy Help?

What are some ways to identify the causes of acne? Why is it that every time I visit a dermatologist for my acne, the doctor says there are many reasons for breakouts and prescribes medication? I've been on medication for a year and a half and have seen 4 to 5 different derm...

Dr. Jiang Zheen Reply:
The pathophysiological changes in acne involve three factors: 1) abnormal keratinization of the pores, 2) excessive secretion from sebaceous glands, and 3) inflammatory responses caused by bacteria within the hair follicles. Hormonal factors are also involved; however, the fundam...

Understanding Skincare Product Compatibility for Acne-Prone Skin

Suitability of Skincare Products I have acne issues... Sometimes after I buy new products, I notice 1 or 2 pimples appearing after 3 or 4 days. Does this mean the products are not suitable for me, or is it a matter of my skin not adapting? (Assuming there is no redness or inflamm...

Dr. Jiang Zheen Reply:
Patients with acne should avoid skincare or cosmetic products that contain ingredients likely to cause comedones. You can check online resources for more information. The majority of patients have combination skin that is oily in the T-zone, although there are some exceptions. Hy...

Understanding Acute Folliculitis: Causes, Symptoms, and Management

Acute folliculitis I often develop small pimples on my thighs and buttocks that resemble acne (other areas of my body also have them, but in smaller quantities). They become pus-filled within just one to two days. I previously visited a dermatologist who diagnosed me with acute f...

Dr. Jiang Zheen Reply:
It is likely a case of folliculitis, which is primarily caused by bacterial infection. As for why it frequently recurs, there could be several reasons: inadequate treatment (antibiotics may need to be taken for a sufficient duration), local environmental and skin issues such as w...

How to Treat Blood Spots from Acne: Effective Solutions

Is there bruising inside the acne, and has it healed now? Hello Doctor, I have a question I would like to ask you. Previously, I had acne, and because I squeezed it improperly and didn't clean it out completely, it resulted in some bruising underneath. It has now healed, b...

Dr. Hong Zhengsheng Reply:
Hello, Xiao Xuan: The best advice is to find a dermatologist you trust and consult with them. I apologize, but based on your written description, I cannot determine your specific condition. Answers found online can only speculate based on the description and experience provided, ...

Can Hyaluronic Acid Benefit Acne-Prone and Oily Skin?

Hyaluronic acid Can skin with acne issues use hyaluronic acid serum for hydration? Is an 8% hyaluronic acid concentration too nourishing for oily skin? I've heard that not applying a moisturizer after using hyaluronic acid can make the skin even drier; is this true?

Dr. Hong Zhengsheng Reply:
Hello, as long as the products do not cause skin allergies, they are generally safe to use. Regarding the concern that "it may be too nourishing for oily skin," I have not found any relevant reports in the medical literature I have reviewed. I recommend that when you ex...

Is Long-Term Use of Astringent Water Causing Sensitive Skin?

Using astringent for acne? Hello, doctor. Ever since I started having acne, I have been using astringent toners with a high alcohol content for my skincare routine... for a whole year. Out of fear of breaking out, I tend to use a large amount each time, about the size of a 50-cen...

Dr. Jiang Zheen Reply:
Prolonged exposure of the skin to alcohol-containing substances can damage the stratum corneum, making the skin more prone to allergies, so it should be used sparingly. Wishing you peace, Jesus loves you.

Effectiveness of Pana No. 5 Gel for Milia and Acne: A Dermatology Inquiry

excuse me? 1. Is Panar Gel No. 5 (Taiwan FDA Drug Registration No. 017814) effective for treating milia or large acne? Also, is laser treatment effective for milia?

Dr. Jiang Zheen Reply:
Panacea No. 5 gel is effective for inflamed and red acne, but it is less effective for comedones and milia. Milia can be treated with a needle and a lancet, and there is no need for laser treatment. God bless you, Jesus loves you.

Understanding Back Pores: Causes, Concerns, and Solutions

Back pores Hello Doctor: Sometimes I have acne and blackheads on my back, but what troubles me the most is the appearance of my pores. Besides being enlarged, they also have dark hairs. Once, I used a pore strip on my back, and when I pulled it off, there were many dark hairs. Up...

Dr. Hong Zhengsheng Reply:
Hello, Xiao Ke: In your message, you mentioned "acne and blackheads... in addition to enlarged pores, there are also dark hairs..." Part of this may be related to your individual constitution, while the rest could be associated with your lifestyle habits, dietary habi...

Understanding Acne Scars: Causes and Treatment Options

Acne scars Hello, doctor... I have some inflamed acne on my face, but after they healed, they feel hard to the touch. I saw a doctor who said it was due to keratinization caused by previous inflammation. The symptoms have persisted for a year. I heard that there are injectable me...

Dr. Hong Zhengsheng Reply:
Hello: If you have any questions regarding diagnosis, medication, or treatment methods, you can consult your attending physician in person, which can immediately resolve your concerns. I apologize, but based on your written description, I cannot ascertain your specific medical co...

Cost and Effects of Glycolic Acid Peels for Scar Treatment

Alpha hydroxy acid (AHA) peel I would like to ask the doctor how much a single session of chemical peel costs? How many sessions are typically needed for acne scars to fade? Are there any side effects?

Dr. Zheng Lizhen Reply:
Hello: Chemical peels will not eliminate pitted scars. The cost varies depending on the materials used and the operator, ranging from approximately $800 to $2000. There may be scabbing, peeling, and pigmentation changes. Sincerely, Dr. Jiang Yu-Jiao, Dermatology.

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