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Psoriatic arthritis

  • Definition

    Psoriatic arthritis is a type of arthritis that often occurs with psoriasis of the skin.

    Alternative Names

    Arthritis - psoriatic

    Causes, incidence, and risk factors

    Psoriasis is a common, chronic skin condition that causes red patches on the body. About 1 in 20 people with psoriasis will develop arthritis with the skin condition. In most cases, psoriasis comes before the arthritis.

    The cause of psoriatic arthritis is not known, but genes may play a role. In general, people who have psoriasis have a higher rate of arthritis than the general population.