Your knee will be swollen at first with a limited range of motion, but you're encouraged to straighten and bend the knee right away if pain allows the movement. Continue bending the knee as much as possible every day and extend it as much as comfort allows without causing you significant pain. Physical therapy will be part of your rehabilitation, which involves knee exercises to strengthen the knee over time. Some patients do not need physical therapy after knee arthroscopy but bending the knee each day will help your body heal.