These patients are often seen by their physician, who diagnoses the ACL injury, and helps to treat the acute symptoms. Once the swelling improves, and the pain subsides, patients often feel "normal."
Do I still need ACL surgery?
One common question of patients who sustain an ACL tear, and then start to feel much better, is if they still need surgical reconstruction of the ligament. It can be hard to accept the rehabilitation needed after ACL surgery if the knee starts to feel good again.Unfortunately, if the ACL is completely torn, there is no chance of the ligament healing properly. While not everyone needs a functional ACL to perform activities, athletes who participate in certain sports that require pivoting maneuvers are unlikely to be able to return without a properly working ACL.
Source:
Tambe AD, et al. "Anterior cruciate ligament insufficiency: does delay in index surgery affect outcome in recreational athletes." Int Orthop. 2006 Apr;30(2):104-9.

