Rehabilitation focuses on patients who have lost the ability to carry out their daily tasks normally, often as a result of some injuries, strokes or some disorders in organ function, especially cases requiring long bed stays, or after a serious injury. Includes rehabilitation: physical therapy, occupational therapy, treatment of any pain or inflammation, and retraining to compensate for loss of ability to perform specific tasks. Treatment usually lasts on several sessions that can last for weeks or months depending on the condition.