Numbness in the half of the child’s body may be a normal reaction, or it may be caused by epilepsy, Guillain-Barré syndrome and other diseases. 1. Normal reaction: for example, prolonged sitting and standing for a long time with unchanged postures may affect blood circulation, resulting in obstruction of blood return and susceptibility to hemiplegia. 2. Epilepsy: belonging to the abnormal brain discharge, when epilepsy acute seizure leads to involuntary convulsions of the body, easy to cause hemiplegia, and accompanied by foamy mouth, eyelid upturning and so on. 3. Guillain-Barré syndrome: it is an acute inflammatory peripheral neuropathy, which is related to autoimmune and infection factors. In severe cases, there may be sensory abnormalities and autonomic dysfunction, leading to muscle weakness and numbness of the lower limbs. There may be other reasons for your child’s numbness, so it is recommended to go to the hospital in time, complete the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor.