Subacromial bursitis after the closed injection is generally immediately effective, some may be hit after 20 to 30 minutes to see the effect, the specific effect of time varies from person to person. Closed injection is a mixture of local anesthetic and hormone, of which the local anesthetic is lidocaine, belonging to the quick-acting local anesthetic, that is, after the injection, the patient will feel the pain will be immediately relieved, the pain can be temporarily disappeared. Part of the subacromial bursitis after the closed needle is usually immediately effective, but for the more serious patients, may need to be hit after 20 to 30 minutes to see the effect. In addition, patients using different closed needle medication, its effect time is not the same. Generally strong hormone drugs have relatively better therapeutic effects and last longer, with a faster time to effect. After the patients with subacromial bursitis have taken the closed needle, they should observe whether the body has any adverse reactions, such as drowsiness, accelerated heart rate and so on. The relevant operation should be carried out by professional doctors.