Table of Contents I. What is Psoriatic Arthritis? II. Symptoms of Psoriatic Arthritis III. Risk Factors for Psoriatic Arthritis IV. Diagnosis V. Treatment What is Psoriatic Arthritis? Psoriatic arthritis, also known as PsA, is a rheumatic disease. Rheumatic diseases involve any disorder that affect the ligaments, bones, muscles, and joint tendons. Psoriatic arthritis is one such disease that affects the joints as well as the skin. Over 1.5 million people in the United States have psoriatic