6-12 weeks: Typically, a rotator cuff strain resolves in 6-12 weeks. They are sometimes associated with other injuries that may take longer. Rotator cuff tears do not heal on their own.They may calm down and stop producing pain, but will not heal back to the original position.Healing after a rotator cuff repair takes 12-16 weeks and continues to improve 6 months after surgery.hey are sometimes associated with other injuries that may take longer. Rotator cuff tears do not heal on their own. They may calm down and stop producing pain, but will not heal back to the original position. Healing after a rotator cuff repair takes 12-16 weeks and continues to improve 6 months after surgery.