Questions tagged [dermatology]

Questions about diseases or disorders of the skin fall under the general tag "dermatology", which is the branch of medicine dealing with the skin. This includes the skin's structure and function as well as any disorders or diseases. It also deals with structures generated in/by the skin, e.g. sweat, oils/sebum, hair, nails, moles, warts, skin coloration and its disorders, etc.

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26 views

How deep into the skin do topical acne medications penetrate?

Given a topical gel that is a mixture of dapsone (6%), an antibiotic spironolactone (5%), an androgen blocker niacinamide (2%), a form of Vitamin B3 and skin brightener How deep into the skin do ...
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49 views

Are there a plastic surgery conditions of a “double chin” or “triple chin”?

Executing Is there a plastic surgery condition of a "double" or "triple" chin? as a search query in three search engines (Google, Bing, DuckDuckGo) and looking at images brought me almost no results ...
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25 views

How dangerous for the human skin are naturally occurring wavelengths above 380nm?

I read on https://www.cancer.org/cancer/cancer-causes/radiation-exposure/uv-radiation.html: UVA rays have the least energy among UV rays. These rays can cause skin cells to age and can cause some ...
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47 views

What is the essential difference between injection lipolisis and liposuction by mean of adipose cells outcome?

I am having the problem of not understanding the essential difference between injection lipolisis and liposuction by mean of adipose cells outcome. Injection lipolysis I understand that injection ...
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For how long does the application of topical retinoids increase photosensitivity?

I read on https://www.medscape.com/viewarticle/726464_6: Owing to potential photosensitivity, topical retinoids are best applied at night and patients should not expose themselves to excessive UV ...
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20 views

Difference between medical and general dermatology [closed]

So I am looking at the different clinical interests of dermatologists on the clinic's website. One provider lists their clinical interests as general dermatology and medical dermatology. I'm ...
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1answer
35 views

Is there any evidence for any positive effects on body functions by alkaline spas?

When a friend asked me what she could expect from alkaline bathings, did I know of any evidence. A quick research also did not reveal meaningful data. From what I know there should be absolutely no ...
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89 views

What is the essential difference between laser for hair/scar/tattoo removal?

I don't have enough physics knowledge to understand the possible difference between laser for hair removal, laser for scar removal and laser for tattoo removal. My problem I don't understand what is ...
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46 views

Are there any substances that can make the hair grow more straight or smoother?

From prior research on substances that change hair texture, I read in the past (and couldn't find lots of sources now) that some Vitamin A derivatives or acne medicines can cause curly hair and that ...
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1answer
37 views

What kind of physician, if at all, adjusts a tattoo in human-skin-color and makes such tattoos to disguise scars?

I understand from this article and from further general reading that tattooing is often done by physicians, or referred to by physicians, if a physician thinks it is the best option to disguise some ...
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Can hair transplant on scar tissue cause hypertrophic (yet not necessarily keloid) scarring and if so, how it is avoided?

It is possible and common to conduct hair transplant on scalp for men and women and on facial beard areas for men ("beard filling" or "beard completion"). Both described transplants are possible to ...
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138 views
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Is there a standard model of scar healing and if so what are its main stages?

I have searched for a standard model of scar healing to learn how dermal scar tissues are formulated and evolved but didn't find one; rather, I found somewhat inconsistency between different ...
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1answer
44 views

Can the use of Hydrogen Peroxide in dentistry worsen the oxidative stress in patches of facial vitiligo vulgaris?

According to this study 1, hydrogen peroxide is not absorbed by the skin, but can cause systemic toxicity when inhaled or ingested. I am not entirely sure how often hydrogen peroxide is inhaled or ...
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Can diseases associated with hyperpigmentation help to find a cure for hypopigmentation such as vitiligo?

Wikipedia 1 has quite an extensive list of diseases that are associated with hyper-pigmentation such as Addison's disease and Cushing's disease. Are there any known studies of the diseases that ...
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2answers
138 views

Why does dandruff shampoo loose effectiveness without shampoo alternation?

I've heard often 1 2 that alternation between anti-dandruff shampoos containing ketoconazole, zinc pyrithione, coal tar, selenium disulfide or salicylic acid is needed for the treatment to stay ...
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How do melanin or pigment related genetics from Vitiligo patients compare to or differ from Albinism patients?

The definition of Albinism is: Albinism is a congenital disorder characterized in humans by the complete or partial absence of pigment in the skin, hair and eyes. 1 The definition of Vitiligo is: ...
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44 views

Is vitiligo transmitted by heredity from one generation to a later one?

There seem to be many testimonies on the internet that suggest that vitiligo is heritable 1. According to a Quara answer 2, there is apparently a 5% chance of transferring vitiligo to your kids. Yet, ...
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34 views

Is tacrolimus carcinogenic and if so, what causes it to be?

The FDA issued a health warning 1 regarding the possible cancer risks of tacrolimus ointment, however, British dermatologists2 don't consider this a significant concern and they are increasingly ...
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1answer
51 views

Can tacrolimus creme cause tacrolimus toxicity?

Tacrolimus is a medication given to patients who underwent organ transplantation. Increased serum level of tacrolimus may cause overdose symptoms. Apparently the normal tacrolimus serum level is ...
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64 views

How does tacrolimus affect vitiligo-affected skin and hair (re)pigmentation?

While tacrolimus (Protopic) creme was not created with the purpose to treat vitiligo, it is prescribed by dermatologists for that purpose. The non-pigmented hairs in vitiligo affected skin treated ...
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14 views

What factors (hereditary or acquired) affect the formation of tan tones and why some people lose tan earlier than other?

I compared two people (both Russians, both have the same skin tone) after tanning. One tan passed after 4 weeks, the other holds even after 4 months. I do not have professional knowledge in ...
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1answer
49 views

What is the difference between eczema and urticaria?

What is the difference between eczema and urticaria? I want to know the pathophysiology and most common causes to understand why they are different !
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1answer
70 views

Do synthetic fabrics pose a health risk?

Background I've seen a large number of health blogs that describe Polyester, Rayon, Acrylic, and Nylon, as harmful or toxic (usually due to chemicals used during the manufacturing process). Some ...
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1answer
50 views

Scar size and human growth

Let's say a toddler has a 4-inches scar running from his eye to his mouth. Will the scar be stretched that when he reached adulthood his scar still runs from his eye to his mouth? I remember reading ...
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56 views

Repairing skin, fat, muscle tears

I have a basic question. I have seen videos of wound treatment, where the doctor induces bleeding around the edge of the wound... to create granulation tissue... then suturing the wound. My question ...
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2answers
102 views

Why does acne get worse during the first two weeks of treatment with isotretinoin?

I've heard and read from multiple sources that acne gets worse during the first two weeks of treatment with isotretinoin, but I haven't been able to find an explanation as to why this happens. From ...
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1answer
74 views

What treatments are available for dandruff/psoriasis

There are basic anti-dandruff shampoos such as Head & Shoulders, and there are coal tar treatments such as Alphosyl 2 in 1, Capasal, Polytar or T/Gel for itchy and flaky scalp problems, but if you ...
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14 views

What are the minimum specifications for a dermascope?

In addition to professionally sourced dermascopes that tend to be expensive are several low end devices that connect wirelessly to a smartphone. What would be the minimum specifications of a device to ...
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2answers
181 views

“There is a very strong correlation between consuming dairy products — such as milk — and acne, skin breakouts and aging.”

I read an article here that says: “There is a very strong correlation between consuming dairy products — such as milk — and acne, skin breakouts and aging.” The reason? Hormones, Bella says. ...
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2answers
86 views

Can you prevent skin tags?

Skin tags, formally known as acrochordons, are small pieces of flesh that protrude from your skin. You’ll know it’s different from a wart or mole because of its pedestal base. Warts are flat on top ...
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2answers
54 views

Biochemistry of (tap water) iontophoresis?

I'm curious to know what science has to say about the biochemical processes of tap water iontophoresis. I was trying to find some insights from the mechanism of action to answer things like: Why does ...
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0answers
46 views

The relation of weight loss speed and loose skin

For the past week I have been hunting for the answer to the following question: Does the speed at which you lose weight have any relationship with loose skin? And the real question, why or why not? ...
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2answers
239 views

Do UV-B emitting lamps for reptile pets produce vitamin-D in human skin?

There are those lamps like e.g. "ReptiGlow" for pet reptilians, to keep them healthy, the output being graded e.g. by habitat: jungle (trees somewhat reduce the UV that hits the animals), or desert (...
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1answer
82 views

How can one product work both as a skin moisturizer and a soap?

The pharmacist gave me this cream for treating dry/dead skin on fingertips, and she also added that I can use it as a soap as well! The manufacturer also confirms this. Normally, you don’t apply soap ...
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24 views

What UV intensity (watts per area) should be the maximum a light-skinned person should be exposed to?

I have a UV AB meter that can measure UV A and B light intensity in microWatts/(centimeters squared). In direct afternoon sunlight, I measure UV AB at about 3000 microWatts/cm^2. In the shade of the ...
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48 views

Does eating manuka honey help prevent acne?

Does eating manuka honey help prevent acne? What I have found so far is unsubstantiated or in vitro. {1}: The Internet is filled with patient testimonials that Manuka honey works marvelously for ...
2
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1answer
61 views

What are these perfectly circular red shapes on the back of that person?

I am now living in Korea and have seen regularly these circular red shapes on the back of Korean people. Here is a picture. Sorry for the low quality, it is difficult for me to take a picture of ...
5
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1answer
70 views

Beyond correlation, why is Frank's sign significant or not?

The Wikipedia lists Frank's sign as Frank's sign is a diagonal crease in the ear lobe extending from the tragus across the lobule to the rear edge of the auricle. The sign is named after Sanders T. ...
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0answers
62 views

How can we prevent inhaling or ingesting mites that live on everyone?

I was distraught to learn today that "mites are living on everyone": Demodex folliculorum, Demodex brevis. What can I do, and not do, to prevent them from entering my body? Am I correct that any ...
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1answer
218 views

How does poor sleep cause circles under one's eyes?

I've read that poor sleep causes circles under one's eyes. Also, I've read that they are caused by dehydration. Is it safe to assume that the way poor sleep causes the circles is by causing ...
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0answers
41 views

Why do skin calluses not heal sometimes and remain tough until they fall off?

Bar exercises such as pull-ups, toes-to-bar etc. usually cause skin calluses on one's hand, just below the place where the fingers are connected to the hand, e.g.:. So the skin in these areas hardens,...
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32 views

Is it bad for skin to be naked so often?

I often feel itchy, very quickly after I take off my shirt. So it made me think about it. I can Imagine that cloth absorbs our sweat and thus prevents it from accumulating on skin which I don't think ...
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1answer
53 views

Epidermis destruction after fish eating skin?

Before a time I asked myself a question: Part of the epidermis cells are dead right, so aren't the fishes (see link below) in a spa dangerous to skin by eating a part of epidermis that basically ...
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0answers
44 views

What diseases could be transmitted skin to skin (massage)?

What kind of diseases one can get from a skin-to-skin interaction such as getting full body massages (without touching intimate parts) assuming a person had mild skin damages that occur after shaving ...
2
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1answer
87 views

Petechiae vs purpura vs teleangiectasia

I am having trouble understanding the visual and structural differences between these vascular lesions. I know that purpura is elevated and that spider angiomas (easly recognizable) refill from the ...
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2answers
84 views

What Causes Stress Hives

I was looking up the effects of stress on skin on WebMD. It only talked about treatment and gave an very basic overview of one potential explanation, but not for the hives in particular. I just want ...
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1answer
29 views

Do simple carbohydrates affect skin quality?

Does eating simple carbohydrates affects the skin quality ? Will it make skin dark, old, dull, dry, wrinkled, saggy, or cause fine lines or age spots?
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16 views

As of Apr. 2018, is topical benzyl peroxide considered to be carcinogenic?

Please notify me of any more recent studies than this from 1995, whose abstract states: Topical benzoyl peroxide has been used in the treatment of acne for over 30 years, with no reports of adverse ...
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2answers
59 views

Tinea Capitis ( Ringworm of the scalp) under a magnifying glass

Supposing a patient has Tinea Capitis (Ringworm of the scalp) what will you see under a magnifying glass?
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0answers
47 views

Why do you not need sun protection whe the UV index is 3?

In Australia, they recommend sun protection when the UV index is above 3. Why is this? Surely whenever it's above 0 there are still UV rays hitting your skin? Would 10 minutes in the sun with a UV ...

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