My baby is having lots of rashes on his face - is this heat rash?

Rashes cause of milk and heat from my experience. Currently experiencing as well. Then it will become flaky and rough then the skin will become soft as before. Doctor advise to make sure to dap with warm water time to time. Make sure to clean after every feeding. She said that to take care of the infected area. It’s more to the baby’s skin is adapting to the environment as well. It is consider worrisome when the baby has a fever, it smells or hot.