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The head may be affected, but this is typically only in young children. [2] The itch is often worse at night. [2] Scratching may cause skin breakdown and an additional bacterial infection in the skin. [2] Scabies is caused by infection with the female mite Sarcoptes scabiei var. hominis, an ectoparasite. [3]
Dermatographic urticaria is sometimes called "skin writing", as it is possible to mark deliberate patterns onto the skin. The condition manifests as an allergic-like reaction, causing a warm red wheal to appear on the skin. As it is often the result of scratches, involving contact with other materials, it can be confused with an allergic ...
Erysipelas (/ ˌ ɛ r ə ˈ s ɪ p ə l ə s /) is a relatively common bacterial infection of the superficial layer of the skin (upper dermis), extending to the superficial lymphatic vessels within the skin, characterized by a raised, well-defined, tender, bright red rash, typically on the face or legs, but which can occur anywhere on the skin.
Rosacea. What it looks like: Rosacea causes redness and thick skin on the face, usually clustered in the center.Easy flushing, a stinging sensation, and small, pus-filled pimples are other common ...
Hunter Steinitz (born October 17, 1994) as of June 2010 was 16 and one of only twelve Americans living with the disease, and was profiled on National Geographic's "Extraordinary Humans: Skin" special. [37] Mui Thomas (born in 1992 in Hong Kong) was 24 as of 2016 and qualified as the first rugby referee with harlequin ichthyosis. [38]
The skin weighs an average of four kilograms, covers an area of two square metres, and is made of three distinct layers: the epidermis, dermis, and subcutaneous tissue. [1] The two main types of human skin are: glabrous skin, the hairless skin on the palms and soles (also referred to as the "palmoplantar" surfaces), and hair-bearing skin. [3]
Constant scratching causes the skin to thicken. The thickened skin itches, causing more scratching, causing more thickening. Affected area may spread rapidly through the rest of the body. Many hypothesize LSC has a psychosomatic origin. [3] Those predisposed to itch as a response to emotional tensions may be more susceptible to the itch-scratch ...
Sarcoptes in humans is especially severe symptomatically, and causes the condition scabies noted above. [citation needed] Another genus of mite which causing itching but rarely causes hair loss because it burrows only at the keratin level, is Cheyletiella. Various species of this genus of mite also affect a wide variety of mammals, including ...