My son is almost 13 and has been having numbness in his legs,and sometimes in his whole body. He has fallen due to his legs giving out while they are numb. Sometimes he sees spots , or half of vision is black. He also is dizzy.He also gets headaches at times. He is not on any medications.The numbness happens while sitting,or laying down. Yesterday he said his whole body was numb and could not move but could see ok,he was laying down.