There are many reasons why children’s legs become numb, such as over-exercise, lack of calcium, anemia and so on. 1. Excessive exercise: Exercise causes rapid blood flow, blood vessel expansion, stimulation of muscles, resulting in muscle strain, which leads to this symptom, usually pay attention to avoid excessive exercise. 2. Calcium deficiency: due to the lack of calcium in the child’s body caused by the symptoms of numbness of the legs, you can eat more calcium-containing foods, such as shrimp, milk, soy products, etc., to maintain a sufficient amount of sleep, can be appropriate exercise, can effectively alleviate the symptoms. 3. anemia: dizziness, fatigue, drowsiness and other symptoms can appear children leg numbness. Children’s leg numbness may also have other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.