This article provides a complete review of arthrofibrosis following ACL reconstruction, and a complete review of theetiology, classification, and histology of arthrofibrosis. A clinician's guide to the recognition of arthrofibrosis and when the arthrofibrosis is clinically significant, treatment of arthrofibrosis after determination of arthrofibrosis, and its treatment to include surgical and nonsurgical management is noted. We emphasize prevention with appropriate indications and timing of ACL reconstruction and appropriate intraoperative surgical techniques for a correctly performed ACL reconstruction. The appropriate rehabilitation and expected clinical progress and parameters to follow after ACL reconstruction with emphasis on early recognition and early treatment will significantly improve the outcome of treatment of clinically significant arthrofibrosis and hopeful prevention of arthrofibrosis. By applying the techniques reviewed, prevention of arthrofibrosis is the orthopaedic surgeons best weapon.