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Science » Planet Earth

All racial problems and conflicts based on melanin

03.09.2007
 
Pages: 12

Tanorexia is considered to be a really dangerous mania that reveals with people who make their skin tanned too much all year round. It is known that basically female teenagers living in countries with cool climate are subject to this mania. To fight tanorexia the British authorities insist that teenagers under sixteen must not attend solaria, and in America children must present a written permission of their parents for attending solaria.

Chloasmas are symmetrical stains colored from dark yellow to brown with distinct borders that appear on the forehead, the dorsum of nose, temples, upper lip, chin, sometimes around nipples and on the belly in the first months of pregnancy. They disappear after childbirth or may stay for a longer period. Chloasmas may also appear during taking hormonal contraceptives or may also indicate some genital diseases of women having them.

Vitiligo is an exclusive instance of depigmentated areas of skin that indicate a disease appearing in areas of skins where melanocytes have no tyrosinase. It is not known for what reasons exactly vitiligo may appear. They may appear against the background of psychic traumas, dysfunctions in the adrenal gland, thyroid gland and sexual glands. Vitiligo is typical of women and cures badly.

Moles or nevus are the most widespread hyper pigmentation type. They are dark spots that may appear on any part of the body; they may be prominent and even have thin hairs on the surface. Some moles appear after the birth and others may appear during the life.

Experts say that hyper pigmentation helps diagnose diseases that people have or have had earlier; it also protects weaker organs. Moles, freckles and other spots are located on projection points of especially sickly organs and give them necessary protection. So, doctors recommend not to disturb such spots.

Veronica Gommerstadt
Medportal

Translated by Maria Gousseva
Pravda.ru

Pages: 12
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