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.et help from a doctor now ›. Severity dictates: Not all rotator cuff injuries are the same. Important variables that determine time to healing include: size, location and extent of the cuff injury along with the overall health of the injured patient.