Whether or not a torn ligament can grow back on its own depends on the extent of the rupture. A mild rupture can recover on its own, while a more severe or complete rupture requires surgery.
Ligaments are vital to joint and limb movement. When a ligament is torn as a result of trauma, different treatments are needed depending on the severity of the rupture.
Mild ligament ruptures can be treated with limb braking (e.g., external immobilization in a cast or a brace) and rest for 4 to 6 weeks, which can help the injured ligaments recover, and most of the injured and ruptured ligaments recover satisfactorily.
If the rupture is more severe or complete, the injured ligament needs to be sutured or treated with ligament reconstruction, and the affected limb needs to be braked and rested after the operation to ensure the recovery of the ligament.