If a simple closed tendon injury is caused by sprain and contusion, etc., in the absence of skin breakage or trauma, you can apply topical ointments with blood circulation and blood stasis, swelling and pain relief effects, such as golden ointment, dog skin ointment, Wan Ying ointment, wound and damp pain relief ointment, etc. These ointments can relieve the local soft tissue injury as well as swelling and pain symptoms, so that the symptoms of tendon injury can gradually recover, or topical ointments with anti-inflammatory and analgesic creams. However, not all tendon injuries can be plastered, for example, any plaster should not be applied topically in case of skin break or trauma, as infection may occur. If the tendon is ruptured or partially ruptured, it should be externally fixed by braking for 4-6 weeks, during which time the external fixation should not be removed and the plaster applied. If conservative treatment is not available or is ineffective, surgical treatment such as incision of the tendon anastomosis should also be used.