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Psoriasis - Cause

The exact cause of psoriasis isn't known.

Doctors believe that the immune system overreacts, causing inflammation and flaking of skin.

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Psoriasis

Psoriasis is a common skin disorder that produces thick red plaques covered with silvery scales. The most common areas affected are the scalp, elbows, knees, and lower back, although any skin surface may be involved. It can also occur in the nails and body folds. Psoriasis is not contagious and cannot be passed from person to person. It can, though, occur in members of the same family. Psoriasis usually begins in early adulthood or later in life. In most people, the rash is limited to a few...

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Many scientists believe that psoriasis can be inherited. About one-third of people who have psoriasis have one or more family members with the condition.1 But it isn't clear that genetic factors alone determine whether you get psoriasis.

Psoriasis isn't contagious—it can't be spread by touch from person to person.

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WebMD Medical Reference from Healthwise

Last Updated: January 09, 2012
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.

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