Children's growth pain is a physiological phenomenon in the process of children's growth and development, which mostly occurs in children aged 3- 12. The main manifestations are limb pain, other joint pain, and even abdominal pain, but lower limb thigh pain is the most common. When a child's leg hurts, it is mostly on one side or both sides. Most children report that the pain in the front and lateral thighs or the back of calves and knees is generally mild. Moderate pain. Individual children sometimes have severe pain, and they may be forced to stop activities or cry at night, or even wake up in pain. Pain usually occurs around dusk. Excessive exercise and fatigue will aggravate symptoms and relieve themselves after rest. Pain attacks are generally irregular, lasting several minutes to several hours at a time, and most of them are short. Pain can occur repeatedly and intermittently, with a course of several months to several years, but generally wait until the child's body is mature.