Newborn NB rashes??

Might be a heat rash? Or sensitive to baby oil or moisturizer? Can reduce clothing like hats and socks if baby already has wrap or onesie on. Avoid any fragances application if can Might it be a milk rash? Any spills on baby while feeding? Happened to my baby too for both

perhaps the rashes were caused by her saliva since its upper body? Just clean her more and see if things improve.