Psoriatic arthritis is a form of arthritis that occurs in people who also suffer from psoriasis. There is no link between the severity of the skin symptoms and the risk of developing arthritis. As with any type of arthritis, the inflamed joints are tender, swollen and painful.
Joints also become stiff after resting, especially after a night s sleep.
Other symptoms include inflamed muscles and tendons, especially around the elbows, wrists and heels. Joints may lose their range of movement and become deformed or locked. Causes A joint forms where two bones come into close contact. Most joints are held together by bands of tissue called ligaments. In psoriatic arthritis, the synovial membrane becomes thickened and inflamed.