Sternocleidomastoid muscle injuries can be caused by prolonged incorrect positioning or improper exercise patterns. It needs to be treated according to the severity of the condition, and can be improved by conservative treatment or medication. 1. Conservative treatment: If the patient’s sternocleidomastoid muscle injury only has slight pain or slight limitation of neck movement, generally by restricting neck or head movement, the purpose is to alleviate the pulling force of sternocleidomastoid muscle, and relieve the pain of sternocleidomastoid muscle. 2. Medication: If the patient’s sternocleidomastoid muscle injury pain is severe and unable to carry out neck activities, diclofenac diethylamide ointment can be used externally, mainly through subcutaneous infiltration to eliminate the local aseptic inflammation, so as to alleviate the pain. If severe pain symptoms occur, you can take non-steroidal anti-inflammatory drugs, such as ibuprofen, etc., which has a good analgesic effect. Sternocleidomastoid muscle injury should be timely medical examination, avoid twisting the neck, so as not to aggravate the injury, but also pay more attention to rest, avoid strenuous exercise.