The pain in the bone joints of the thumb is due to the following reasons: 1. arthritis of the interphalangeal joint of the thumb, mainly due to too frequent activities of the joint, resulting in wear and tear degeneration of the cartilage in the joint, which leads to aseptic inflammation, manifested as joint pain when moving the thumb, and local joint edema is reduced at the moment of rest, with limited extension and flexion of the thumb, not accompanied by numbness. 2. synovitis of the interphalangeal joint of the thumb, mainly due to cold or trauma 3, gouty arthritis, common in patients with hyperuricemia, especially in the diet of animal offal, seafood and other purine food, will lead to a sharp increase in blood uric acid, the formation of crystals deposited in the joint and gouty arthritis performance, as long as 4. Infection, various causes of bacterial invasion of the skin into the soft tissue joints, resulting in bacterial multiplication and redness, pain, limited activity, the need for anti-inflammatory treatment, septic need to be incised and drainage.