Thumb joint pain may be caused by tenosynovitis, synovitis and gout. 1. Tenosynovitis: tenosynovitis is due to long-term manual labor, the tendons and tendon sheaths of the hand rub against each other, and excessive friction causes inflammation, which ultimately leads to tenosynovitis, which is mainly manifested as pain in the joints of the fingers, localized pressure and pain as well as restricted joint movement and other uncomfortable symptoms, so pain in the joints of the thumb may be due to tendon sheaths. 2. synovitis: synovitis is mainly due to finger trauma, infection lesions, immune abnormalities and other factors leading to degeneration of finger joints, and ultimately synovial inflammatory changes, usually manifested in joint swelling, joint pain and limited joint activity, so the thumb joint pain may also be caused by synovitis. 3. Gout: gout is due to the body’s blood uric acid level is too high, caused by uric acid crystals deposited in the joints triggered by the disease, can be seen in the joints, the patient will have obvious pain in one or more joints, and joints, redness, swelling, elevated skin temperature, so the thumb joint pain may also be due to the gout caused by. Because of the causes of thumb joint pain are more, so when the discomfort symptoms, should be timely to the hospital for examination and diagnosis, under the guidance of a professional doctor, combined with the personal situation of targeted treatment, to avoid misunderstanding aggravate the symptoms.