Leg pain is a common symptom in many children, and many parents think that it is “growing pains” and does not require treatment. In fact, there is no such thing as “growing pains” in medicine, and there is no such thing as “growing pains” in any professional medical journals or magazines. There is no pain without a reason, all pain has a cause. This pain is not related to “growth”, the so-called “growing pains” usually “attack” at night, in fact, it is the accumulation of a day of exercise, similar to athletes after a lot of exercise This is similar to the sauna that athletes take after a lot of exercise to fully expand their blood vessels, speed up blood circulation, and expel as much lactic acid and other waste products from exercise as possible. The so-called “growing pains” in children should be expressed as benign nocturnal limb pain in children. It is caused by muscle fatigue and lactic acid production after a lot of exercise, similar to the muscle aches and pains that adults occasionally experience after exercise. In addition, mistaking pain around the knee club and lower leg in children for benign nocturnal limb pain in children instead obscures many other conditions that may be detected early. For example, some hip dislocations may also present with leg pain after exercise in the early stages. Benign nocturnal limb pain in children, it has the following characteristics: 1. It is mostly seen in children aged 2 – 12 years. 2. It presents as pain at night, with normal daytime activities. The pain is intermittent, and the pain does not increase over time. 3.The attacks mainly accumulate muscles, multiple parts, not joints. 4.The physical examination and laboratory tests are normal. If the symptoms are not consistent with the above description, you need to promptly visit the hospital for further examination. And the treatment of benign nocturnal limb pain in children usually uses symptomatic treatment, such as local heat and massage, which can ease the child’s tension. It is not necessary to restrict the child’s activities, but if the pain is more severe, care should be taken to let him rest more, relax the muscles and refrain from strenuous activities. Small children should be allowed to take more nutrients that can promote the growth of cartilage tissue, such as milk, bones, walnuts and eggs, all of which contain elastin and collagen. And vitamin C is good for collagen synthesis, so you can let your baby eat more vegetables and fruits rich in vitamin C, such as green vegetables, leeks, spinach, citrus, grapefruit, etc.