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Psoriasis is a chronic skin condition that causes red, itchy rashes covered with silver scales. Later in life, psoriasis patients can develop psoriatic arthritis, which causes stiffness and joint pain. Both conditions have flare-ups where the condition worsens for a period of time. Some patients miss these symptoms at first, leading to a late diagnosis.

Sausage Fingers

Joint inflammation can cause swollen hands with "sausage" fingers. Each finger is reddened, tender and puffy, making it hard for the patient to function normally. The swollen fingers might feel hot, as if the patient has a fever. Some mistake swollen fingers for an allergic reaction and don't seek medical care.