Painful bending of the patient’s index finger joint may be caused by trauma, tenosynovitis, gout and other related diseases, or it may be a normal physiological manifestation. When the patient’s index finger is subjected to external pressure, sprain or contusion, it may cause fracture of the index finger, ligament injury, etc., which may lead to pain after bending the patient’s index finger joint. Tenosynovitis occurs in the finger joints, which is a chronic sterile inflammation, and the patient may have clinical manifestations such as limited joint movement and pain in the index finger joint. Gout is due to an increase in uric acid in the patient’s body, urate deposition in the index finger and other joints, resulting in an inflammatory reaction, the patient will appear in the finger joints of the redness, pain and other clinical symptoms, mostly in the night attack. In addition, if the patient recently used the index finger joint too often, may also cause bending pain, is a normal physiological phenomenon, the patient can pay attention to rest. If you are experiencing flexion pain in the index finger joints, you need to actively diagnose and treat it so as not to delay your condition.