13

The potential health risks of sunscreen include: The absence of UVA filters combined with a longer exposure time of the sunscreen user1995, 2005, 2007, 2007. Suppression of the skin's production of melanin, a natural broad-spectrum photoprotectant1995, 2004. Skin penetration (free radical generation) by sunscreen chemicals1996, 1997, 2006, 2007. Cytotoxic ...


12

Frankly, medical terminology isn't necessary and might even lead to increased confusion, especially after being translated. All medical terminology is not universal. Just state your complaint in plain language as clearly as you can using layman's terms. I doubt that a Japanese doctor needs much more guidance from you than simply understanding your ...


11

Vitamin D is produced in the skin, not the eyes.(1) I would imagine that when those indigenous peoples were introduced to sunglasses, they were also introduced to a number of other items they had never previously known, such as tobacco, alcohol and fast food. Diseases they had no immunity to might also have played a role. The synthesis of vitamin D is ...


11

Short answer: No. Longer answer: UVB rays are essential for Vitamin D synthesis. According to some studies, 1 hour of sunshine is needed even in sunny climates - but only in average, still depending on latitude, skin color and other factors - to prevent Vitamin D deficiency. Still, even the average sun exposure in mid-latitude regions summers might not ...


11

The exact value depends on a lot of things - skin tone, the time of day, latitude, how deep the shade is,... The study Vitamin D effective ultraviolet wavelengths due to scattering in shade found that the UVB radiation at 280–320 nanometers that is needed for vitamin D production dropped to levels at around 50% in a tree shade and under an umbrella. It ...


10

Wearing sunscreen while out in the sun cuts your risk of skin cancer. As others have pointed out, there are some potential risks associated with wearing sun screen. However, if you are out in the sun, these risks are far outweighed by the risk of UV exposure. This Skeptics.SE answer has a very comprehensive overview of the facts, in particular citing a ...


10

The short answer is no, it doesn't, at least as long as your not also coupling it with something like auto-asphyxiation, which is so dangerous for many other reasons before hair loss. First the medical term for the harmless hair loss in males is "alopecia" (might help online searches). The most common kind of male hair loss is Androgenic alopecia (AGA), ...


9

Wrinkles are not directly proportional to age; people have different collagen properties. Some people wrinkle far earlier than others, and in different ways. But yes, smiling does promote wrinkles to some degree due to repeated muscular contractions causing the same skin wrinkling pattern, but smiling also has beneficial and lasting neurobiological effects ...


8

Like many medications you want to use the amount necessary, no more, no less. Contact dermatitis has been caused by Neosporin (and similar products). I would mention a few particular reasons: Topical antibiotics can contribute to medication resistant germs, and having goop sliding out of a bandage and onto non-injured areas of your skin serves no beneficial ...


7

About 1/4 - it varies with the reflectivity of the surface, and angle of the sun. Detailed study is at http://www.ncbi.nlm.nih.gov/pubmed/20199222


7

Get to a doctor or dermatologist straight away A changing mole is an indicator of possible melanoma. Melanoma spreads very quickly, and mortality rates rise fast if it is left to grow. Here is some information on what to look for, and potential indicators of melanoma (UK NHS). Melanomas usually appear as a dark, fast-growing spot where there was not one ...


7

Your skin will not make enough protective lipids regardless of whether you use moisturizer or not. With your skin, it's actually better if you use it every day, at least on areas where you get eczema. Eczema (or Atopic Dermatitis) is an incompletely understood skin disorder, in which the normal skin barrier function (permeability) is compromised, allowing ...


7

Actually, I am a frequent flyer (I think I spend at least 10% of my year in an airplane or an airport) and I discussed the problem of sunlight with my treating physician. First, sunlight has an impact on the circadian rythm (which involves the secretion of melatonin, cortisol, control of body temperature) which regulates your wake/sleep cycle. The effect ...


7

These dark circles can likely be attributed to vascular network prominence caused by hollowing of the contents of the orbital rim, pigmentary changes in the periorbital area caused by extravasated hemoglobin and its breakdown products (bilirubin and biliverdin), or to visibly accumulating fluid in the lower eyelid due to local processes such as atopy or ...


6

There are actually a few ways that moles are removed. Cutting it off Sometimes moles can be "shaved" off if the cells don't go very deep. Other times, the mole cells will be deeper in your skin, so the doctor will have to make a deeper cut to prevent it from coming back (like taking a weed out by its roots). The deeper cuts will usually require ...


6

No Skin damage is irreversible. The only thing you can do is make sure your skin is not damaged in the first place. Skin damage is caused by a variety of factors, but by far the most important one for most people is UV exposure. The primary source of UV is the Sun, but tanning booths may be a significant factor for some people. While sun burn causes an ...


6

From the picture and the symptoms you mentioned, especially the itchiness, it seems that you are right about it being that being eczema. Also, eczema is common behind the knees. From that picture though, it does not seem like that eczema is very bad. There are a lot of worse cases. Though there is still some dispute in the medical world, one study1 says that ...


6

You are right that there are conflicting viewpoints about whether or not Vaseline and other types of petroleum jelly, also known as petrolatum, are comedogenic (can cause or worsen acne). There are medical professionals who will say that petroleum jelly will cause acne, while others might argue the opposite. The same also goes for research, though most ...


6

I'll assume you're only asking about mechanoreceptors, else it gets too murky. Humans have four types of mechanoreceptors. Meissner corpuscle, innervated by RA1 (rapidly adapting type 1) nerve fibers. There are 2 of the fibers per square millimeter in the monkey finger (my source does not list it for humans), with 10 to 20 Meissner corpuscles per axon, ...


6

Good evening, The reason the abscesses in your mouth won't heal on their own is due to: The fact that the mouth is one of the areas of the body with the most bacteria Therefore, the immune system cannot get ride of all bacteria, especially when they reside in or around teeth, which are relatively poorly vascularised and doesn't regenerate after being ...


6

Eczema (atopic dermatitis) Atopic dermatitis is a chronic, itchy skin condition that is very common in children but may occur at any age. It is also known as eczema and atopic eczema and was formerly known as Besnier prurigo. It is the most common form of dermatitis. Pathophysiology The pathophysiology of atopic dermatitis is complex and ...


5

There is no cure for vitiligo, but there are treatments that may reduce the discoloring in your skin and possibly even restore skin color. The main treatments used by doctors are either restoring the skin to normal color, or bleaching the skin, so that all of the skin is an even color. They do these things in a number of ways, including topical treatments ...


5

Your question sounds like it generalizes about all sunscreen products. But not all sunscreen products are created equal. I understand your concern because according to this report from the National Institute of Health Recent reports about sunscreen safety have received widespread media attention Media attention will lead to opinion based questions. So ...


5

CO2 laser treatments work by vaporizing the damaged skin cells. After the procedure, you will need to take medication to reduce swelling in your eyes, but you can also ease the swelling by elevating your head when sleeping. You will be itchy for 12-72 hours after the procedure. For the next week, your skin will get dry and peel. Your face will also be red ...


5

There is no complete cure for Limited Scleroderma (LS). Luckily, there are good ways that doctors can treat the symptoms of it and help prevent any complications.1,2,3 Topical treatments - one of the complications of LS is skin ulcers; if these become infected, there are some topical treatments to stop them from spreading Antacid drugs - used to stop some ...


5

Before I answer, I have to say that I disagree with several claims stated/implied in your question: antibiotics or any treatment cannot be simply replaced by another; many factors have to be taken into account, such as the type and severity of acne, the microorganism(s) (bacteria) causing the problem and many others topical use of antibiotics definitely ...


5

You can't reverse the skin damage, but you can treat wounds and burns, so your skin cell can regenerate faster. Eating food full of antioxidants and vitamin C, such as blueberries, tomatoes, and cherries can reduce the body’s need for fluids, lowering only the risk for dehydration (study). If you have a skin sunburn, here are few advices: Do not pick, ...


5

Shampooing The first synthetic shampoos were introduced in the 1930's and by '70s and '80s, daily shampooing became norm in the US. So shampooing in the modern sense (water to produce a soapy lather) is only about 100 years old. Our modern shampoos are a combination of surfactants (such as SLS) which dissolve natural oils (sebum) and remove dirt particles. ...


5

One big problem here is that it's difficult to do double blind studies. One is then forced to use more theoretical arguments, but because medical science is not a hard science like physics, such arguments are not very reliable. The best we can then do is argue from biological plausibility, in this case we should take serious the fact that Homo Sapiens ...


5

Creases form all over your body. Once they do, there is really very little that can be done for them. If you doubt this, consider how much money is spent on cosmetic surgery every year just for facial creases. They can be filled with collagen or other substrate, they can be stretched, the muscles around a crease can be relaxed, decreasing the depth of the ...


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