Knee pain and tight tendons are caused by localized swelling of the knee, blockage of blood circulation and restriction of movement, resulting in painful symptoms. In Chinese medicine, it is said that “if it does not pass, it hurts”, which is a paralysis, and the principle of treatment is to activate the blood to eliminate swelling, to pass the channels and relieve pain. This leads to joint adhesions and swelling. Second, the patient has a history of rheumatic and rheumatoid diseases, and the alternation of cold and warm seasons causes swelling of joints and muscles. Degenerative osteoarthritis caused by osteoporosis in the elderly, and swelling and pain caused by severe wear and tear of the joint surface. Fourth, improper exercise leads to ligament damage such as chronic injury to the anterior fork ligament, posterior fork ligament, medial and lateral collateral ligaments or meniscus, which may lead to swelling and pain in the knee. Fifth, a history of gout can also lead to knee swelling. So if a patient has knee pain and tight tendons don’t get nervous, timely consultation and treatment at a regular hospital is the right way to go.