Thumb joint pain is common for the following reasons: First, degenerative osteoarthritis of the thumb joint, mostly seen in elderly patients, patients will use their fingers for long-term excessive activity and exposure to cool water. The thumb joint will be enlarged and deformed, even with swelling and pain symptoms, and the range of motion of the thumb joint will also be affected. X-rays can be taken to find narrowing and hyperplasia of the thumb joint space. Second, trauma to the thumb joint, in the process of sports, the thumb joint is easily damaged by direct impact of balls, resulting in pain, swelling, and limited movement of the thumb joint, short-term cold braking, the symptoms will soon be relieved. Third, some patients develop stenosing tenosynovitis of the flexor tendon of the thumb, and the pain can be radiated to the thumb joint, which the patient may mistake for thumb joint disease, but in fact it is the painful symptoms caused by stenosing tenosynovitis.