No one knows what causes the skin condition psoriasis. In addition, no one knows why about 10% of people with psoriasis go on to develop a related type of arthritis—known as psoriatic arthritis.
However, a new study reveals that the risk for psoriatic arthritis may be affected by having a previous injury to a bone or joint.
Researchers examined the data on about 70,000 psoriasis patients over the course of nearly 20 years. They found that the patients who had experienced bone or joint trauma had an about 50% increased risk of developing psoriatic arthritis, compared with those who had no trauma history.1
The study authors clarified that this doesn't mean people with psoriasis shouldn't be active or play sports because of the risk for injury. Especially since more study is needed to confirm the connection.
Rather, those with psoriasis who have experienced trauma to a bone or joint can be on the lookout for signs of psoriatic arthritis so they can be diagnosed and treated early.