Try a sippy cup maybe? What about a syringe thing like they use with the infant drops? Maybe try a brand that has a different flavor? Give him a cool drink. Have you tried a cool bath? You don't want the water too cold. But cool water can help.
@Kali we typically like to wait before giving medicine, but he was crying and holding his body close while saying “owe” which means he had muscle aches. At that point I do think medicine needs to be used.
@Kelly these are great ideas! Thank you!
Our children's hospital pediatrician advised us to let the fever go until 105 before bringing it down with Tylenol to give the body a chance to fight it off, so far it's helped. (that is as long as he is drinking water, urinating, and doesn't become overly lethargic) His fevers last a day, if that. Our little guy is pretty stubborn so I feel ya, wish I could be of help. Hope he feels better soon!