The main symptoms of tendonitis are localized pressure pain and pain when pulling a muscle. Tendonitis usually occurs where the tendon attaches to the bone, such as the elbow joint of the humerus epicondylitis occurs in the forearm extensor tendon. The main symptom of tendonitis is pain in the area of the tendon, especially when flexion and extension activities, the pain will be more obvious, but there is no local redness, swelling, when there is a clear localized bump and popping, limitation of a series of limb activities, especially flexion and extension, it is considered that tendonitis is more likely. The above symptoms do not fully confirm the diagnosis of tendonitis, when the local tendon pain and long-term can not be relieved, it is recommended to consult a doctor in a timely manner.