15 percent of people with psoriasis develop psoriatic arthritis
Psoriatic arthritis often develops in people who also have psoriasis, which is an autoimmune disease that causes the immune system to go into overdrive and attack the skin. In people with psoriatic arthritis, the immune system also attacks the joints and causes inflammation.
Psoriatic arthritis may be hereditary
Though it is not known exactly what psoriatic arthritis facts, about 40 percent of people with the condition have a family member with psoriasis or arthritis, which suggests that heredity may play a role
Symptoms flare and subside
Like psoriatic arthritis facts, the symptoms of psoriatic arthritis flare and subside, and vary from person to person. Inflammation and joint involvement can even change locations in a person over time
One or multiple joints may be affected
psoriatic arthritis facts may affect only one joint, a few joints or many joints in the body. Fingers and toes can become swollen, which is called dactylitis. Fingernails and toenails may also be affected.