There are many clinical reasons why patients experience muscle swelling and pain. Muscle injury occurs due to long-term chronic strain and strain, resulting in the accumulation of lactic acid in the muscle, which will also manifest as swelling and pain. In the treatment, the patient can be asked to reduce local weight-bearing activities, and also pay attention to keep warm. Topical ointment can be applied to invigorate blood circulation and remove blood stasis and disperse nodules, while infrared therapy, low and medium frequency electrotherapy and microwave therapy can also be used to assist in the treatment. Patients can also be instructed to take oral anti-inflammatory and analgesic drugs to reduce clinical symptoms.