Collateral ligament injury often refers to the elbow or knee joint collateral ligament injury, according to the severity of the disease can choose general treatment, plaster fixation, surgical suture and other methods of treatment. 1. General treatment: for mild collateral ligament injury without rupture, patients can elevate the affected limbs, brake, apply ice packs locally within 72 hours in the early stage of the injury, rest more in daily life, maintain a balanced diet, and keep a happy mood to promote early recovery. 2. Plaster fixation: moderate collateral ligament injury can be fixed with plaster cast or support, elevate the affected limb, take non-steroidal drugs such as diclofenac sodium, ibuprofen, etc. to relieve the local pain, and then go down to the ground and recover gradually after 4 weeks. 3. Surgical suture: for severe collateral ligament injury, there is obvious tear or even rupture, need to carry out surgical treatment, such as ligament suture repair, etc., after the operation, under the guidance of the doctor to carry out rehabilitation training, 6 to 8 weeks after the ground can be active. It is recommended that patients with collateral ligament injuries actively cooperate with doctors for treatment to avoid delaying the condition.