Is this heat rash?

Ann

It actually just comes and goes, he doesn’t seem bothered by it he gets more of it when he gets upset and cries.. today that’s basically all he’s been doing if I’m literally not staring at him and iv been dead tired. I change him feed him snuggle then try to put him down then cries more, I play entertain him and then go need a break and he gets so pissed off.. maybe he just misses daddy..