Decreased grip and pinch strength Grinding with movement of the thumb Joint deformity Stiffness Swelling at the base of the thumb Thumb pain can also occur with rheumatoid arthritis (RA)—an ...
In PsA, the deformity starts in the distal interphalangeal (DIP) joint at the top of the finger. Over time, it can move to the proximal interphalangeal (PIP) joint in the middle of the finger and ...