Tennis elbow, or epicondylitis of the humerus, is a painful inflammation of the tendons on the outside of the elbow in the forearm. The cause of the pain is a chronic injury caused by repetitive force on the forearm, especially when gripping or lifting objects. Tennis elbow has a slow onset and initially is only a soreness on the outside of the elbow joint, which is exacerbated by exertion of the hand. Tennis elbow can be treated with rest, physical therapy, closed treatment, medication, surgery, etc. Yunnan Baiyao Spray can be chosen for medication. Yunnan Baiyao Spray has the effect of activating blood circulation and removing blood stasis (promoting blood circulation and eliminating blood stasis in the body), and anti-inflammatory and analgesic effects, and it can be used externally in the affected area to reduce swelling and alleviate pain and relieve the symptoms of tennis elbow. Once tennis elbow occurs, you should go to the hospital in time and take medication and treatment under the doctor’s guidance.