Understanding Autoimmune Conditions: Psoriatic Arthritis Fundamentals

Medically Reviewed by Carolin Schneider, MD

Photo Courtesy: [katleho Seisa/E+/Getty Images]

Psoriatic arthritis is a condition that occurs when someone who has psoriasis — an autoimmune skin condition —  also develops the joint and bone condition arthritis. Around 30% of people with psoriasis experience psoriatic arthritis at some point in their life. Psoriatic arthritis typically affects joints in the fingers or toes, which are often described as looking “sausage-like” with nail deformities. Psoriatic arthritis may also affect the lower back, wrists, knees or ankles. If you live with psoriasis, learn more about psoriatic arthritis to better understand how the condition affects people and what treatment options exist.