Call your doctor. An ACL tear is a serious injury that may require surgery.
RICE (Rest, Ice, Compression and Elevation) is the best thing for most injuries for the first two to three days. If a doctor decides surgery is necessary, he or she will not perform it until the swelling from the injury goes down.
An ace bandage may provide comfort and prevent swelling.
Use crutches, if necessary.
See your doctor if:
You feel a popping sensation when you move your knee—this may require immediate treatment.
The pain is too much to bear.
You have sprained your knee more than once.
You have knee pain, swelling or stiffness which lasts more than a few days.
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