Thumb osteoarthritis is a common condition, particularly among adults over the age of 50. It affects the carpometacarpal (CMC) joint, located at the base of the thumb. Where the thumb meets the wrist. This joint plays a vital role in gripping, pinching, and performing daily tasks. When osteoarthritis sets in, it can cause pain, stiffness, and a loss of function.
Thumb osteoarthritis occurs when the cartilage that cushions the ends of bones in the CMC joint wears down over time. Without this protective layer, bones rub against each other, leading to inflammation, pain, and reduced mobility.

