Mild injuries of torn cruciate ligaments can generally heal on their own, while severe tears generally require formal treatment such as surgery. 1. Mild injury of torn cruciate ligament: If the ligament part of the injury is mild, no rupture or part of the mild rupture, through the joint braking to reduce the activities, bed rest, generally can be self-healing. 2. Serious injury of torn cruciate ligament: If the torn cruciate ligament is serious, such as rupture or avulsion fracture with displacement, generally need surgical suture, fracture repositioning and immobilization, and go to the hospital in time to receive regular treatment. After a cruciate ligament tear, the treatment is different due to the different degrees of the tear. The milder ones can recover on their own, while the more serious ones should undergo standardized treatment under the guidance of a doctor.