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Seborrheic Dermatitis

Source: www.sfsu.edu
Topic: Dermatitis
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Sort Desciption: First encounters are memorable. I can remember feeling this slightly itchy, flaky rash developing around the edge of my nose during the first year of medical school, a highly stressful time. ...

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First encounters are memorable. I can remember feeling this slightly itchy, flaky rash developing around the edge of my nose during the first year of medical school, a highly stressful time. This was my first encounter with seborrheic dermatitis and it has remained with me off and on ever since, acting as a barometer of my stress level. It is a common skin problem of young professionals. Seborrhea is a disorder of inflammation and scaling that occurs in oily skin, like behind the ears, in the groove around the nose, on the eyebrows, sideburns and the scalp. The scalp component is considered a variant of common dandruff (see companion piece under D). Causes Current thinking is that the skin is reacting to an overgrowth of Pityrosporum yeast in oil-bearing skin. There is an inherited component and there are some features in common with psoriasis. An intriguing fact is that any emotional or physical stress can cause seborrhea to worsen. There is no more dramatic example than when an individual develops the AIDS syndrome. In these cases, the rash shows a florid redness and scaling covering not only the face but the entire chest. Signs and Symptoms Mild forms are simple dandruff with a little redness, often at the hairline. More extensive forms demonstrate a greasy scale on a red base, with a predilection for the eyebrows, nasolabial groove (beside the nose), and the anterior chest. Occasionally it is limited to the armpit or groin, where it can be easily mistaken for ringworm. Seborrhea has been associated with eyelash scaling which is very annoying--this is called blepharitis and is treated with gentle washing with baby shampoo and prescription antibiotic/steroid ointments. Treatment Refer to dandruff treatment for the scalp. Washing with ZNP soap, a zinc-based product, can be recommended. In general, washing is critical ...

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