Biology Stack Exchange
Biology Stack Exchange

Questions tagged [skin]

The skin, part of the integumentary system.

For questions about the skin, part of the integumentary system (skin, hair, feathers, nails, scales, hooves). The role of the system is to protect, detect, help regulate, and is a site of vitamin D synthesis.

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How and why do skin tags develop?

WebMD writes: Skin tags are small, soft pieces of skin that stick out on a thin stem. They most often appear on the neck, armpits, upper trunk, and body folds. The cause of skin tags is not known. Do we really know nothing about why they appear?…
Christian
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My hand was stabbed with a pencil tip 10 years ago - why is the graphite still visible?

I, and multiple people that I know, have permanent marks (up to 30 years) from a graphite pencil puncturing the skin. The palm of my hand still shows a very clear mark where my hand was punctured by a pencil 10 years ago in school. Why/how does the…
J.Todd
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Is the fingerprint regenerated?

Let's say you get a a cut on your finger. Will the fingerprint be regenerated to matched your original fingerprint and if so, how?
TanMath
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Can anti-aging cream work?

I have a friend who told me that anti-aging cream cannot work to reduce wrinkles as it only penetrates x amount of skin layers and can never make a long term effect. Me not knowing much about how penetrative skin actually is, I was wondering if…
SaturnsEye
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Why sun rays don't burn our skin?

Can you explain (or direct me to a link) the process by which a photon of $8.10^{14}$ Hz is absorbed by the skin without damage, whilst a slightly more energetic one (UVB) makes damage? What area of skin is necessary to absorb one single photon? How…
user32816
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How thick is the residue from a fingerprint?

I am trying to work out the mass added to a small glass sphere when it is picked up with bare fingers.
Dirk Bruere
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Dead skin cell decomposition

What would be the resultant by-products of a completely decomposed dead skin cell? What would be the size of each of the by-products of a decomposed dead skin cell? How long would it take for a dead skin cell to begin to decompose? I am curious…
user9871
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Why does some skin hold perfume longer than others

I was wondering my girlfriend and I used the same perfume for a while and we sprayed the same place. And after a day her skin still smells nice while mine smells normal. Will different types of perfume hold longer on different skin types?
FastSolutions
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How does salicylic acid work on acne?

There are claims that salicylic acid has an effect on acne. I have done preliminary research and found multiple sources saying: "Salicylic acid [can] help prevent future breakouts." -…
Brian
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Has aloe vera been proven to help heal burned skin areas?

I don't like buying into "natural remedy" type things without seeing scientific proof behind them. There's an almost universal belief that aloe vera helps to heal burned skin, and whether that includes assisting in cell regrowth, preventing…
J.Todd
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What causes pinkish hue to some skins?

I know it is caused either by blood vessels beneath skin , or some pigment called "pheomelanin" . But what is it in fact?
user596200
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Do we as humans develop tolerance to deodorants or antiperspirants?

Do we as humans develop tolerance to deodorants or antiperspirants? In particular when they contain isobutane, isopropyl, palmitate, isododecane, dimethicone, coconut oil, magnesium oxide, allantoin, dimethiconol, disteardimonium hectorite,…
Reggin Toggaf
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Is there any difference between fascia and skin ?Are both the different names of the same thing?

Skin is the outermost layer of the body ,and it consists of two layers; epidermis and the second layer the dermis .There is another layer the (third layer) beneath the dermis called superficial fascia or subcutaneous tissue. I want to know that is…
Rabik John
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Why can silicone reduce keloid?

I heard people use silicone sheet for reducing raised scars (i.e., keloids). I was wondering what is the rational behind it, and whether it actually works.
Tim
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How can botox cure wrinkels?

How can botox cure wrinkels? Do wrinkles caused by tension of some muscles in the skin? Can these muscles be relaxed by hypnosis or training?
Dims
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