Psoriatic arthritis is chronic inflammation of the skin (psoriasis) and joints (inflammatory arthritis).
0.3% to 1% of the population
Typical Age of onset
PsA usually occurs between ages 40 through 50, but the disease may also occur in young children and elderly patients.
Swollen fingers and toes
Lower back pain
Swelling in the hands, wrists, elbows, shoulders, knees, ankles, feet, and spine