Children’s leg pain every half month is generally due to synovitis or growing pains and other causes, it is recommended to go to the hospital for a detailed examination, and then according to the specific causes of the symptomatic cure. 1. synovitis: generally due to external trauma, bacterial infections and other factors, resulting in intermittent pain, limited mobility and other symptoms, you can use medication under the guidance of the doctor, but also in the doctor’s advice, surgical treatment. 2. Calcium deficiency: children are in the stage of rapid growth and development, if the body is not enough nutrients, calcium is relatively lack of elements, will lead to slower bone growth, but also lead to growth pain in the knee joints, you can massage relaxation or follow the doctor’s instructions to supplement calcium. Usually pay more attention, pay attention to proper rest, timely supplementation of nutrition and calcium and other trace elements for children, diet should be reasonable, healthy and nutritious, to develop a good dietary habits.