A child’s leg pain may be due to growing pains, but it may also be due to trauma, hip synovitis, and other factors. Growing pains are rapid growth of long bones caused by localized muscle and tendon growth imbalances during a child’s growth and development. It is usually a sudden leg pain that usually occurs around the knee or in the front of the leg. Leg pain in children can also be caused by trauma; children at this stage are very active and can accidentally injure their knees, leg ligaments or break bones. If the leg pain is caused by trauma, the painful area will be accompanied by symptoms such as cyanosis, swelling and pressure. Or it may be caused by synovitis of the hip joint, which may be associated with immaturity of the femoral head and loosening of the joint capsule. If there is excessive abduction, such as strenuous jumping, the joint capsule will be damaged or squeezed, leading to synovial edema and pain. If your child has frequent leg pain, you should pay attention to it, go to the hospital for diagnosis in time, clarify the cause and treat it actively. In daily life, pay attention to avoid strenuous exercise, strengthen the warmth, avoid catching cold.