The signs and symptoms of psoriasis vary depending on the type you have. Some common signs for plaque psoriasis -- the most common type of psoriasis -- include:
Plaques of red, inflamed skin, often covered with loose, silver-colored scales. These plaques may be itchy and painful and sometimes crack and bleed. In severe cases, the plaques will grow and merge into one another, covering large areas.
Disorders of the fingernails and toenails, including discoloration and pitting of the nails....
About 2% to 3% of people in the United States.
Every year about 150,000 people in the U.S. are newly diagnosed with
Some cultures more than
others.3 For example, it is common in Japanese people
but not in native North Americans or native South Americans. It is uncommon
among blacks in tropical areas, but it is seen more often among blacks in
temperate areas, such as in the United States and Europe, where the year-round
climate is moderate.
Gudjonsson JE, Elder JT (2008). Psoriasis. In K Wolff et al., eds., Fitzpatrick's Dermatology in General Medicine, 7th ed., vol. 1, pp. 169-193. New York:
Habif TP, et al. (2005). Psoriasis and other
papulosquamous diseases. In Skin Disease: Diagnosis and Treatment, pp. 106-115. Philadelphia: Elsevier Mosby.
Abel E, Lebwohl M (2008). Psoriasis. In EG Nabel, ed., ACP Medicine, section 2, chap. 3. Hamilton, ON: BC Decker.
Primary Medical Reviewer
Kathleen Romito, MD - Family Medicine
Specialist Medical Reviewer
Alexander H. Murray, MD, FRCPC - Dermatology
January 6, 2010
WebMD Medical Reference from Healthwise
January 06, 2010
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