also it isn't red it's the same color as his skin but it on pretty much his whole forehead

it's only on his forehead. I haven't changed any soaps. @firefly

post a pic u thought my lo had heat rash abs is eczema. Have you done anything different soap water detergent?

probably a heat rash... get some cortizone cream I think they have one for babys...or A&D

eczema

It could also be "baby acne" or eczema. My little sister had it terrible all while she was a baby

could be heat rash... post a pic if u can ☺