When the patient after the tendinitis, in addition to taking drugs, physical therapy, but also can choose to play closed injection treatment, usually need one to two weeks to return to normal. Severe cases may also have the danger of infection spreading and cannot return to normal. Tendinitis is a kind of sterile inflammation, and when the disease attacks, there will be obvious edema around the tendon sheath and painful symptoms. Closure injection is the injection of glucocorticoids into the tendon sheath to relieve the inflammatory edema and pain of the tendon sheath, which should be done under the supervision of a doctor. It takes two to five days for the symptoms to subside, and the condition usually returns to normal after one to two weeks. However, it should be noted that if acute purulent tenosynovitis is not treated in time and the infection spreads, tissue necrosis may occur, and in severe cases, amputation may be required. In this case, it will not be able to return to normal. During the recovery period, patients should avoid too much activity on the affected area in daily life to prevent the inflammation area from being repeatedly stimulated, which will affect the recovery of the tendon sheath. In addition, patients should also pay attention to their daily diet, eat less spicy and greasy food, and eat more fresh vegetables and fruits, so that the body can recover faster. It is recommended that patients with tenosynovitis should seek medical attention in time and follow the doctor’s instructions for treatment, rather than blindly using medication.