The symptoms of psoriasis include:
Areas of itchy, scaly skin on the scalp, knees, elbows, and upper body; these deep-pink, raised plaques of skin have white scales.
Psoriasis on fingernails and toenails can make the nails become thick, pitted, and discolored; nails may separate from underlying nail bed.
Red, scaly, cracked skin with tiny pustules on the palms of the hands and/or feet; you may have pustular psoriasis.
Symptoms of psoriatic arthritis include:
Stiffness, pain, a...
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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