Psoriatic arthritis is a form of arthritis that sometimes develops
in people who have a skin condition called psoriasis. It causes swelling and
pain in joints—most often in the fingers and toes—in an irregular pattern that
may be different on opposite sides of the body.
Treatment for psoriatic arthritis includes pain medicine, patient
education, and physical and occupational therapy. Severe cases may require more
powerful medicine, such as biologic drugs, or steroid injections.