A tennis elbow is a pain of elbow when people overuse a forearm muscle. If people flexion or extension muscle, it will a pain of elbow. The pain of tennis elbow may exist or recover or pain all the time depend on a period and characteristic of injury. If there is often used the elbow muscle or immediately will cause the tear of tendon or muscle severely that an effect to inflammation suddenly. A practice to competition, training, and playing sports is an important of tennis elbow cause. In addition, the tiny tear of Extensor Carpi Radialis Brevis (ECRB) muscle is the cause of tennis elbow. If people are the tennis elbow but not treatments, they will do not daily routine as before. According to Mallen, Chesterton, and Hay(2009), it was found that about 5 in 1,000 adults develop tennis elbow each year. It affects the most people who are the ages of 35 to 55. Women and men are affected equally. People will be able to accept which movements lead to bring on their pain and they should try to avoid these as much as possible. (Johnson, Cadwallader, Scheffel, 2007). The treatments of tennis elbow will treat to period of injury if there is an existent inflammation, people who are a tennis elbow should use ice massage and external medicine for reduce swelling. If non-inflammation, people can massage, stretch, and exercise for increased strength and flexibility of muscle.