Baby heat rash, eczema, or acne

Ana

It all started with a little acne on the face then turn out to be heat rash now that i went to her 1 month check up her pediatric said that it might be baby eczema to bath her with Aveeno baby products. I did, its been a week and it not going away instead its spreading to all over her body. Has your baby gone thru this? What did you do ?

*She was born with really dry skin from 41 weeks in my womb.