Ligament strains in children can be improved through physical therapy and surgery, depending on the specific situation. This condition is usually caused by inadequate preparation or violence, resulting in the ligament being stretched beyond its ability to tolerate. It is mainly characterized by ligament pain with swelling and limitation of movement, and in severe cases, ligament tearing may occur. When this situation occurs, it is recommended that ice can be used to apply cold compresses within 72 hours, and hot towels or hot water bags can be used to apply hot compresses after 72 hours to effectively relieve pain and swelling. If necessary, immobilization in a cast or brace can be used. If the ligament is torn, you should go to the hospital in time for surgical treatment, such as ligament reconstruction surgery. During the treatment period, you also need to rest more, do not exercise too early, and can eat foods rich in vitamins and proteins to promote recovery.