That's pretty natural. They have a... "sensor" I guess (you can see it, it's a funky looking scale on their head) that enables them to tell if a predator is above them. The youngsters are pretty low on the food chain up until full growth, so they tend to be a bit more nervous about anything above them (and everything else...) than an adult would.

Once he's more comfortable though, he probably won't mind the head. Mine used to go into complete sleepy-bliss mode if I rubbed between his eyes. But they're all different, so that depends entirely on him.

Do you have the water bowl on the hot side? That could help humidity a tad. Otherwise I'd just spray him 2-3 times a day. I'm not really sure what you can do about the heat without destroying what humidity you have, I was a sucker and just kept my room at 80 for them (it was miserable) :\. Maybe a low wattage bulb? Like a regular house light, and just go up in watts until it settles. Assuming your family is crazy like mine and keeps like 20 different lightbulbs in the cupboards.