Tiger’s mouth at the thumb joint pain, the following common causes: 1, joint sprain: in the process of heavy physical labor, easy to occur thumb joint sprain, the patient will have localized swelling, pain, and limited activities, serious cases may also occur joint dislocation, resulting in localized deformity of the joints, through the shooting of X-rays can be diagnosed by the joint subluxation, early reset, immobilization and braking, cold compresses, the symptoms can be gradually relieved. Early restoration, immobilization, braking and cold compresses can gradually relieve the symptoms. 2.Degenerative osteoarthritis: If you use your thumb for a long time to work, it will cause degenerative changes in the thumb joint, which will form osteoarthritis, most of which occurs in the middle-aged and old-aged patients, and there will be swelling, deformity and pain in the joint, and the range of joint activities will be reduced. X-ray filming can reveal narrow joint space and joint osteophytes, and the pain can be relieved after timely administration of medication, such as oral Celecoxib, and so on.