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Psoriasis
Causes & Prevention
Submitted by Steve Ross on Sun, 01/28/2007 - 4:34pm.
The cause of psoriasis is not known yet, and various theories have been put forth over the years.
Currently, it is thought that psoriasis is the result of an immune system dysfunction: the immune system (T cells) mistakes healthy skin cells for antigens (invading microorganisms), initiating an on-going cycle in which new skin cells move to the top layer of the skin too quickly and dead skin and white blood cells pile up on the skin's surface. Apparently, genetic and environmental factors both play a role in this malfunction.
Submitted by Steve Ross on Mon, 07/30/2007 - 6:06pm.
Editor's Note:
"Race" is sometimes mentioned as a risk factor in the development of certain cancers and a number of other diseases. When you read this in a discussion about an illness, note that the explanation seldom refers to anything biological. Instead, it usually refers to behavior, such as eating habits. The kinds of behavior usually mentioned as risk factors are culturally determined. They are not genetic or biological.
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