1. Health

Psoriasis

From , former About.com Guide

Updated October 27, 2010

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Psoriasis is a skin disorder that affects about 1 in every 50 men. There are various types of psoriasis, but the most common is known as plaque psoriasis. Skin cells are normally replaced over 28 days, but in people with psoriasis, the process is more rapid and takes just four days. These new skin cells form thick, scaly, raised red patches called plaques. If the scale is removed from psoriasis, the area bleeds in a characteristic pin-point manner, known as the Auspitz sign.

Psoriasis usually appears on the knees, elbows or the scalp, but can appear pretty much anywhere on the body. It is itchy and uncomfortable, and many sufferers say it leads to a lot of embarassment. So-called 'geographic plaques' can occur when smaller patches eventually merge into one or more very large patches on the body.

Despite its sometimes distressing appearance, psoriasis is not infectious and has nothing to do with personal hygiene.

What Causes Psoriasis?

The precise cause is not fully understood. Psoriasis may start at any age, though its incidence seems to peak between 20 and 30, then again between 50 and 60. There is also some evidence that it occurs more often in cold climates, and especially in Caucasians and African Americans. Psoriasis often appears to be triggered by an infection (especially strep infections), skin injury, and certain medicines. Psoriasis occurring in an area of trauma is known as the Koebner phenomenon. Other triggers seem to be stressful life events such as exams, relationship problems or bereavement.

How Long Does Psoriasis Last?

Psoriasis is a life-long condition for which there is currently no cure. Large areas of psoriasis can persist for years, yet in some cases the condition will go into spontaneous remission, sometimes disappearing for years.

Mental Health Effects of Psoriasis

Severe skin conditions like psoriasis can have a very negative effect on emotional health. The sufferer may believe the condition appears unattractive to others and might withdraw from social contact as a result. Some may turn to alcohol and smoking as a way of coping with psoriasis. Ironically, both of these activities -- especially smoking -- can make the condition worsen.

Treatment and Management of Psoriasis

Some tips that may help you include:
  • Wear light cotton clothes and avoid synthetic fabrics.
  • Keep the skin well-moisturized to prevent itching and irritation. A variety of ointments, gels, creams, soap substitutes and special shampoos are available to try.
  • Your doctor is likely to prescribe topical forms of corticosteroids to help reduce inflammation and itching. Be sure to use them as directed.
  • Some people appear to benefit from ultraviolet light treatment.
  • Reduce your stress level.
Finally, there are numerous new injectable medications known as biologics that dramatically improve psoriasis in most people. As they require only intermittent use, biologic medications are typically more convenient than topical treatments for psoriasis, but their potential side effects are more serious.

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