Hi, may I answer your health queries right now ? Please type your query here... my son is 4yrs. old and had on & off fever since last night, I gave him tylenol and advil every 4hrs. Couple hours ago he had nose bleed and vomitted blood, but he s breathing was ok , I put ice on his forehead and it s stops. I want to know what is the cause, is it viral because of the fever?, please help.