Rash or Acne or Eczema, help!!

Shambulinga

My boy has developed rashes on his face. Took him to GP, he said it looks like a heat rash. We have limited our use of heater, I am not sure if the doctor is right. Have any of you come across this, I have posted a pic as of today. What did you do if have been in the same situation to treat this?

Any suggestions or insight would help, thanks!