Children’s leg weakness may be related to hypoglycemia, hypotonia and peripheral neuropathy. 1. Hypoglycemia: If a child’s weakness is short-lived, it may be a transient weakness caused by hypoglycemia. 2. Hypotonia: If the child is relatively young, it is important to pay attention to the presence of hypotonia, which may cause weakness of the legs. 3. Peripheral neuropathy: Inflammation of the peripheral nerves, such as poliomyelitis, can also cause weakness of the lower limbs and weakness of the legs. The child’s leg weakness, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.