Pain in the thumb joint at the tiger’s mouth, the following common causes: 1, joint sprain: in the process of heavy physical labor, easy to happen thumb joint sprain, the patient will have local swelling, pain, and limited activity, and in serious cases may also occur joint dislocation, resulting in local deformity of the joint, through the shooting of X-ray can confirm the diagnosis of joint dislocation, early reset, fixed and braking, cold, can make the symptoms get 2, degenerative osteoarthritis: such as long-term use of the thumb for work, will cause degenerative changes in the thumb joint, resulting in the formation of osteoarthritis, most of which occurs in middle-aged and elderly patients, the joint will have swelling, deformity, pain, the range of motion of the joint will also be reduced, X-ray can be found in the joint space narrowing, joint osteophytes, after timely medication, such as oral celecoxib can relieve Pain.