Once you have torn your anterior cruciate ligament, you'll find it extremely hard to walk, since the ACL is one of the four main ligaments that surround and support the knee. Any weight will cause your knee to give way completely and cause much pain. If you can't put any weight on your knee, it is a sure fire sign that you have torn something important. Surgery is available to repair the ligament, but you may also heal without surgery by taking on physical therapy and rehabilitation.

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