The healing period for arm muscle strains is around four weeks, such as arm deltoid strains, or power muscle strains such as biceps and triceps, the repair time is faster, and the recovery time is around four weeks by reducing sports and reducing limb chores. During the recovery period, you can use regular anti-inflammatory and pain-relieving drugs, together with blood-activating drugs to relieve blood stasis more quickly. In the case of rotator cuff muscle strain, the recovery period will be greatly extended, with a recovery period of about 1.5 months for rotator cuff injuries. It is recommended to wear an abduction brace when rotator cuff injury occurs, so that the tension on the rotator cuff muscles will be reduced, which will help the rotator cuff muscles to repair themselves.