Thumb Arthritis

Thumb arthritis, also known as basal joint or CMC (carpometacarpal) arthritis, develops when the cartilage cushioning the joint at the base of the thumb wears down over time. It’s one of the most common forms of arthritis in the hand, particularly in adults over 40.

• Pain at the base of the thumb, especially with pinching or gripping
• Swelling and stiffness at the thumb joint
• Reduced strength and range of motion
• A visible bony prominence or “squaring” of the thumb base in advanced cases

Thumb arthritis is more common with age, in women, and in people with a history of thumb injury, repetitive stress, or joint laxity.

Splinting and activity modification – Anti-inflammatory medication – Corticosteroid injections – Surgical options, including joint reconstruction, for advanced arthritis affecting daily function

We tailor treatment to the stage of your arthritis and your functional demands, from custom splinting through hand therapy to surgical reconstruction for advanced cases.