Children always have leg pain, mostly due to growing pain, is due to the body grows too fast resulting in muscle, joint pain, does not belong to the pathology, pay attention to more rest, and enhance nutrition, supplement vitamin D, calcium, more sunshine, good local massage is able to relieve this pain. If the pain is more serious, you can also consider taking oral antipyretic and analgesic drugs, such as ibuprofen granules, or local ointment to promote blood circulation and pain relief. If the pain is severe, you should go to the hospital for further examination, you can do local X-ray and rheumatology tests to determine if the bone is damaged. Many children who are infected with streptococcus may develop rheumatic diseases, which can lead to joint pain, so it is important to do anti-streptococcus O test and rheumatology tests in time to help clarify the diagnosis.