Recovery time for chronic strain injury of arm muscles needs to be determined according to whether the patient is actively intervening and treating or not, if actively intervening and treating the recovery time is about 2~3 weeks, if not actively treating the recovery time is about 1 month or more. Chronic strain injury of the arm muscle requires active intervention, avoiding weight bearing on the hand in daily life, avoiding strenuous exercise, avoiding cold, paying more attention to rest, etc. In terms of treatment, localized osteopathy can be used to treat chronic strain injury. In terms of treatment, localized pain relief can be achieved by using medications such as bone pass cream and diclofenac diethylamide cream. You can also have localized arm massage, physiotherapy and other therapeutic means. This active intervention takes only 2-3 weeks to return to normal. Without active intervention the recovery time can be more than 1 month, and if the arm is used with weight during this period, the recovery time may be even longer. Medications should be used as directed by a physician. If other complications arise on the basis of chronic strain injury, it is recommended to go to the hospital as soon as possible for consultation and treatment.