Because the rotator cuff is such a highly used group of muscles, it can be hard for it to heal on its own without medical intervention. Torn muscles, ligaments, and tendons need significant rest to start the healing process, and due to the rotator cuff’s normal day-to-day activity, in most cases, it does not receive enough rest in order to recover naturally. It is possible to regain some mobility in the affected arm and shoulder even if a rotator cuff might not heal on its own. Avoiding strenuous activity can allow the injury to partially heal, but if it is left untreated, a full recovery may not be achieved.