Put him someplace very warm and dark, with no drafts at all. When my birds get 'colds' like this I actually hang a heating pad on high on the outside of the cage. Warmth is key to sick animals, birds especially. Any vet will back me up on that.

Make sure there is PLENTY of CLEAN water. Birdie vitamins couldn't hurt.

Explain in more detail please.

My bird has enflamed nostrils, his nostrils are bigger, and when I hold him he is really cold. He's been sitting on his cage floor a lot and sneezing a lot. What should I do? There are no avian vets near me so that isn't an option. Any ideas?