Heat rash or allergy?

Seems like heat rash. My girl also had that, but it went away naturally after she turned 6mo. It is on and off. But as much as possible, just moisturise. Some doctors would give steroids cream, but I was highly against it, so we just use baby-safe moisturisers. It goes away soon and won't leave any marks/scars.

I just noticed my baby had this too! Think the weather is too hot recently. May be heat rash