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The exact cause remains unknown. A combination of elements, including genetic predisposition and environmental factors, are involved. It is common for psoriasis to be found in members of the same family. Defects in immune regulation (white blood cells called T cells mistakenly target healthy cells instead of attacking foreign substances) and the control of inflammation are thought to play major roles. Despite research over the past 30 years, the "master switch" that turns on psoriasis is still a mystery.
Learn more by reading our full medical article on psoriasis symptoms, signs, treatment, and prognosis.
"Epidemiology, clinical manifestations, and diagnosis of psoriasis"