Children with fever calf muscle pain, consider the following two aspects: 1, the human body fever after the body’s metabolism is abnormal, a large number of abnormal metabolic products accumulation, such as the accumulation of lactic acid in the body, stimulating the local nervous system, causing local muscle pain in the calf, the pain is not intense, you can give local massage, hot compresses, drink more water, bubble feet with hot water, the pain can soon be relieved. 2, children with acute benign myositis. Caused by viral infection, influenza virus is common, the disease begins with fever, runny nose, nasal congestion, cough and other cold symptoms, or diarrhea, followed by calf muscle pain, bilateral more than unilateral, pain for dull pain, severe cases can be accompanied by walking difficulties, calf muscle tenderness, but no abnormal sensation, no redness, children should be promptly to the regular hospital examination, give systematic treatment, generally good prognosis.