Leg sprains are commonly caused by muscle strains, ligament injuries, meniscus injuries, etc. The treatment methods include physical therapy, medication, surgery, and so on. 1. Muscle strain: acute muscle strain should be braked and rest, ice, pressure bandage, elevate the affected limb. If the pain is severe, oral anti-inflammatory drugs such as Loxoprofen sodium can be taken to relieve pain, and with the external use of Yunnan Baiyao Spray to activate blood circulation and eliminate blood stasis, reduce swelling and relieve pain. 2. Ligament injury: if the knee joint ligament injury, simple knee medial collateral ligament strain should be immediately cold compresses, pressure bandage, severe pain can be applied to ibuprofen, diclofenac sodium and other drugs; partially ruptured by the above treatment, straightening and inversion of the position of the brakes; complete rupture should be surgical suture and then fixed. 3. Meniscus injury: for longitudinal tear of meniscus in red and red-white zones, arthroscopic suture repair is feasible; for those who cannot be repaired, partial meniscectomy is feasible (e.g., medial free edge tear, transverse and horizontal meniscus, or lingual tear); for severe crushed tear, meniscectomy is feasible. If the above symptoms are serious, it is recommended to go to the hospital for early and regular treatment. The above medications should be used under the guidance of a pharmacist or doctor, avoid self-medication.