Tennis elbow closed injection most patients will be effective on the same day, a small number of patients with poor results, need to be re-injected after a week. Tennis elbow, also known as lateral epicondylitis of the humerus, mostly seen in tennis players, but also seen in chefs, piano players and other people, is a chronic injury aseptic inflammation, the main clinical manifestations of the lateral elbow pain, especially in the hard to make a fist and stretch the wrist when the pain is exacerbated. Most of the tennis elbow to take conservative treatment methods, such as pain is obvious, the use of oral medication is not effective patients, can be taken to closed treatment, that is, closed needle injection, the injection of drugs are mostly a mixture of local anesthetic drugs and hormone drugs, such as Lidocaine, Trimethoprim and so on. Most patients can see the effect immediately after the injection, significantly relieve local pain, only a small number of patients are not obvious, the need for multiple injections, but the need for an interval of more than 1 week before the injection. Patients with tennis elbow should also rest more, avoid heavy lifting or excessive activity of the affected limb, and if conservative treatment is not effective, surgical treatment may be needed. The above medications and treatments should be administered under the supervision of a doctor.