a day ago my husdand and i went out to the park with our son and when he headed back home he was sleeping in the car. awhen he awoke he told me his ear was hurting , but i didnt think anything of it until i kissed it and he said it hurt, so i looked at it and unerneath his right ear it was a little bit swollen,when i asked him if he hurt himself there he said that when his daddy opened the car he felt a gush of wind hit him in that area, and then his ear vibrated and it started to hurt . What do you think it is?