About Psoriasis Psoriatic Arthritis Psoriatic arthritis is a specific type of arthritis that develops in 10 percent to 30 percent of people who have psoriasis. The wide range is due to the difficulty in accurately diagnosing psoriatic arthritis, particularly in its milder forms.
Psoriatic arthritis can start slowly with mild symptoms, or it can develop quickly.
Psoriatic arthritis can develop any time, but for most people it appears between the ages of 30 and 50, and it affects men and women equally. This form of PA is much like rheumatoid arthritis but generally milder with less deformity. It usually affects multiple symmetric pairs of joints and can be disabling. The associated psoriasis is often severe. About 50 percent of people with this form of PA will develop varying degrees of progressive, destructive disease, which can be disabling.