Frequent leg pain in children may be related to growing pains, nutrient deficiency and other factors. 1. Growing pains: children due to faster growth and development, the pituitary gland secretes a large amount of growth hormone, stimulating bone growth and development, which leads to growing pains in the legs. Parents should pay attention to give children more high-quality protein, and appropriate massage legs to relieve pain. 2. Nutritional element deficiency: due to the child’s rapid growth and development, calcium, vitamin D and other nutrients in greater demand, when the child’s exercise is insufficient, less sun exposure, the human body synthesizes less vitamin D, is not conducive to intestinal absorption of calcium and phosphorus, affecting the formation of bones. Children often leg pain may have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.