What Are Psoriatic Arthritis Symptoms and Signs?
In most patients, the psoriasis precedes the arthritis by months to years. The arthritis frequently involves the knees, ankles, and joints in the feet. Usually, only a few joints are inflamed at a time. The inflamed joints become painful, swollen, hot, and red. Sometimes, joint inflammation in the fingers or toes can cause swelling of the entire digit, giving them the appearance of a "sausage." Joint stiffness is common and is typically worse early in the morning.
Patients with psoriatic arthritis can also develop inflammation of the tendons (tendinitis); inflammation of the tendon behind the heel causes Achilles tendinitis. Inflammation of the chest wall and of the cartilage that links the ribs to the breastbone (sternum) can cause chest pain, as seen in costochondritis.