5 Year Old Grandson Came Home From School Complaining Of

5 year old grandson came home from school complaining of headache, while we were waiting for Mom to get home from store he would occasionally bang his hed with his fist when waves of pain hit, She gave him some ibuprofen and he seemed fine until about an hour hour, when he woke up screaming and crying saying his left ear anf that side of his head hurt. He was given ibuprofen again, which seems to have taken the edge off the pain, but he says it still hurts when he yawns, should we take him to ER