A knee collateral ligament injury is a strain of the medial and lateral collateral ligaments of the knee caused by trauma, resulting in problems with the stability of the knee. Minor damage means that the symptoms are not very serious and can be recovered by physical therapy, medication and daily rest. 1. Physical therapy: In general, when there is a minor injury to the collateral ligaments of the knee joint, ice packs can be applied immediately to reduce swelling, and straightening splints can be worn so that the knee joint can be completely straightened to speed up the healing process. 2. Drug treatment: patients can follow the doctor’s instructions through medication to relieve, such as China Bone Marrow Pills, diclofenac sodium extended-release tablets, Panax notoginseng tablets and so on. You can also apply medication externally, such as Yunnan Baiyao Cream, which has a very good pain relief effect and helps recovery. 3. Daily recuperation: patients should pay attention to keep warm and avoid getting cold. Cold will cause spasm of the injured ligament, resulting in aggravation of pain in the patient’s knee joint. After the ligament injury, the patient should not carry out flexion, extension and weight-bearing activities too early to avoid aggravation of the ligament injury, which is not conducive to recovery. Diet should be light, prohibit spicy stimulation, smoking and drinking.