I have a two year old who likes to hop. Yesterday he was hopping close to his sister s bed and he fell against it and now has slight swelling beside one eye and a small red area. I didn t allow him to sleep for at least two hours, and he didn t show any signs of a concussion at that time. This evening, he has had an upset stomach and has thrown up 3-4 times. He has pretty well emptied his stomach, and since about noon, he has not had much of an appetite. Has also been playing with his ears today. We do have others in the house with colds at this time. So, not sure if this is a possible side effect of hitting his cheek/eye area, or if it is the beginning of a flu type thing.