Hi there,
Since the
fever has just started, we would not do anything more in the emergency room than you would at home.
Tylenol, or
acetaminophen, is the way to go, 1g per dose, 4-6 hourly, not more than 4 doses total in a day.
Cold compresses around the face area can be used for comfort, but if you intend to sponge the rest of his body, use tepid water so that it doesn't
shock the body into retaining more heat.
Make sure he drinks 2-3 litres of fluids in a day, if he is dehydrated the fever will be higher. If there are sores in the mouth, make sure you treat it with numbing gels or lozenges so that he can drink enough water.
Get help if you can't keep the fever down despite the Tylenol and sponging, or if he is not able to take enough fluids to keep his hydration up. He should also get checked after three days or so if it doesn't turn out to be hand, foot and mouth disease, and the fever keeps recurring once the Tylenol wears off.
Hope this helps, and all the best to you and your son.
Regards,
Dr. Teh