If he is truely not feeling well I'd advise a vet visit. If he has an infection in his toe, he will need oral antibiotics.
The best place to check to see if your dog is too warm and may have a fever is the inside of the ear.
This is not always
I agree the dry warm nose thing is a myth. A dog's normal temperature is 101.5- 102.5 degrees F.
3.5 Common BCI, 0.2 Central American BCI 0.1 ATB, 0.1 Hog Island boa, 1.0 Burm, 1.1 Dumerils Boa, 0.0.1 Pueblan milk snake, 1.0 Sinaloan milk snake, 0.0.1 Indonesian Blue Tongue skink,0.0.1 Kei Island Blue Tongue skink, 0.0.2 Northern Blue Tongue skink, 1.1 Leopard gecko