The more I'm thinking on it,
hexamita sounds right. Fish come with them in low numbers in the gut, it's pretty common. Some stress or weak diet causing weak immune system, can cause them to over populate. And you'll get these white heads of infection popping up around the sensory glands those white heads eventually pop and then it's a hole there. I think you just noticed it early to where it's not that bad yet and kind of looks like ich still.
Is the poop looking good good still or is it white and stringy? That would be another confirmation that it's hexamita between the pimples and the poop going white and long instead of more pellet like and thick and colored like the foods it eats.
Assuming hexamita with HITH from the hexamita, you may need
metronidazole (meteoplex) plus it's good to help counter secondary infections and limit damage.
It may just clear up and reverse with the
paracleanse though I'm not seeing anything far along enough to think you have to worry about secondary infections, but usually when the white heads pop, the hole that's left keeps growing from bacterial infection. And the metro comes in handy to treat that.
I wish I could find that diagram on the internet, its the locations of the sensory pits on cichlids but on all cichlids, they run down the lateral line of the fish and on the face they start at the nose and curve around both the eyes. Angels and discus have curved lateral lines from their body shape down their sides. It was good diagrams just can't find it to share it. Ot gives a better understanding of where they are and helps to diagnose if its sensory pits or not. Pretty sure the diagrams were in a scientific article on LLE/HITH.
Anyways I think in your case the HITH is secondary to the Hexamita and treating the hex will revert the HITH. If not and the white heads grow bigger and protrude more, you'd need the metro next so they don't get bacterially infected when they do pop.
Increased temp to 82F for angels is just to speed metabolism, it keeps their appetite up and aids in the medications running through the fish faster. A little food here or there every few hours, can be helpful also, when fish are sick they burn calories faster and don't feel good, dont want to go for the food so enthusiastically, so smaller more frequent feedings and hopefully he eats enough still and doesn't get rundown and weak.