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Thumb arthritis

Thumb arthritis

Thumb arthritis is common with aging and occurs when cartilage wears away from the ends of the bones that form the joint at the base of your thumb — also known as the carpometacarpal (CMC) joint.

Thumb arthritis can cause severe pain, swelling, and decreased strength and range of motion, making it difficult to do simple tasks, such as turning doorknobs and opening jars. Treatment generally involves a combination of medication and splints. Severe thumb arthritis might require surgery.

Symptoms

Pain is the first and most common symptom of thumb arthritis. Pain can occur at the base of your thumb when you grip, grasp or pinch an object, or use your thumb to apply force.

Other signs and symptoms might include:

  • Swelling, stiffness and tenderness at the base of your thumb
  • Decreased strength when pinching or grasping objects
  • Decreased range of motion
  • Enlarged or bony appearance of the joint at the base of your thumb