Up to 8 percent of people who have psoriasis (a skin condition that is characterized by scaling and swelling) develop psoriatic arthritis. The condition occurs just as often in women as it does in men, and it is most likely to occur between the ages of 30 and 50. In a person with psoriatic arthritis, the joints (and sometimes other areas of the body) become inflamed. Joint pain and tenderness do not occur as often with psoriatic arthritis as they do with other types of arthritis. A few other symptoms of psoriatic arthritis include eye pain and redness, low back pain or neck pain, and swelling of the fingers and/or toes. Treating psoriatic arthritis can involve lifestyle changes, medications, and routine monitoring and ongoing care. Some risk factors for psoriatic arthritis include a family history of the condition, certain genetic factors, and trauma to the skin.