Psoriatic arthritis (PsA) is a chronic condition that occurs in people with psoriasis. Psoriasis is an inflammatory disease that affects the skin and nails and can also affect the joints. Finger PsA may cause pain and swelling in one or more finger joints.
Carpal tunnel syndrome is a condition that affects the hand, wrist, and arm. It happens when the median nerve gets compressed, or squeezed, at the wrist. The median nerve is a large nerve running from the palm to the upper arm.