When you have psoriasis -- a condition that makes thick patches of itchy red, white, or silvery skin -- you could get psoriatic arthritis, too. The inflammation of your skin comes from your body's immune system going haywire. Your immune system might also attack your joints, making them swollen and stiff. An early diagnosis can prevent or limit the damage.
Who Gets It?
Most people who get psoriatic arthritis already have psoriasis. Only about 15% get it without any history of skin trouble.
If you have psoriasis and you notice joint pain, see a doctor who specializes in arthritis. Up to 3 in 10 people who have psoriasis get psoriatic arthritis.
We don't know exactly what causes it. It's most likely passed on in families. About 40% of people with the condition have a close relative who has joint or skin problems, too. Infections like strep throat may also have some links to psoriasis.
Stiff, puffy, sausage-like fingers or toes are common, along with …