Children’s hand numbness, may be related to improper sleeping posture, may also be due to hypocalcemia, central nervous system disease and other reasons. 1. Improper sleeping position: children in the process of sleeping, if the long time to maintain an improper sleeping position, resulting in prolonged arm pressure, resulting in poor blood circulation in the arm of the side of the pressure, may cause hand numbness. By changing the position, appropriate activities arm, is conducive to relief, without special treatment. 2. Hypocalcemia: some children due to long-term partiality, picky eating, resulting in insufficient dietary nutrients, resulting in calcium deficiency, due to a serious calcium deficiency, easily induced hypocalcemia, which may cause numbness of the hands, may also be accompanied by numbness of the feet, hands and feet cramps and other discomforts. 3. central nervous system lesions: common in encephalitis, meningitis, brain tumors and other diseases, may lead to patients with local cerebral nerve damage, induced brain dysfunction, may show hand numbness neurological deficits, may be accompanied by dizziness, headache, nausea, vomiting and other manifestations. Children’s hand numbness, may also be related to other factors, if the symptoms continue to get no better, should be sent to the doctor in a timely manner, after diagnosis of the cause, to give targeted treatment.