He may have allergies to the dust and what not that is circulating when the air is on. I would recommend seeing a vet so they can tell you what to use to help treat the allergies and ensure it is not asthma.
From lack of mention of any other cats, I'm guessing he is the only one you've had? He sounds be doing very well! A nice tip is rubbing alcohol on his paw beans with help draw out fever. He is not likely to get it again, but his fight is not over and neither is yours. When it comes to distemper...
That being said, it does depend on the level of pain. Many times they won't show pain until it's dangerous bad. I care for kittens and many have cried out in pain from something else going on.
How long have you had him? I know it takes time to adjust to new surrounds and animals. Sounds and smells are VERY important for these blind babies. Putting a bell on another kitten may confuse him if you get bell toys. Kittens have their own language he will pick up on. The best thing to...
Looks like ringworm. Simple anti fungal will take care of it. If it doesn't clear up the vet can give a pill. Make sure you're washing your own hands and not scratching at any spots. It will spread. As far as acne, make sure to stay away from plastic bowels.
Aubree recently developed an intense wobble to her 10 days after her spay where they use a hard wire to stitch her up. She has been cleared by the vet of inner ear infections. They had given her clavamox on her first visit and is now on Antivert and Prednisolone. Both of which I am unfamiliar...