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Types of Psoriasis (cont.)

Psoriatic Arthritis

Psoriatic arthritis is a disease in which a person has both psoriasis and arthritis. Psoriatic arthritis is an inflammatory, potentially destructive and deforming form of joint disease.

Picture of severe psoriatic arthritis involving the finger joints.
Picture of severe psoriatic arthritis involving the finger joints.

Psoriatic arthritis, like psoriasis, is an autoimmune disease, meaning that the immune cells damage one's own tissues. Rarely, a person can have psoriatic arthritis without having skin psoriasis. Usually, the more severe the skin symptoms are, the greater the likelihood a person will have psoriatic arthritis.

Picture of psoriatic arthritis. Severe deformity of the joints at the ends of the fingers.
Picture of psoriatic arthritis. Severe deformity of the joints at the ends of the fingers.

Psoriatic arthritis affects 10%-30% of people with psoriasis. A recent survey by the National Psoriasis Foundation indicated that approximately 1 million people in the United States have psoriatic arthritis. Often people who have psoriasis are unaware that they have psoriatic arthritis.

Medically Reviewed by a Doctor on 7/20/2015

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