Chicken pox? Eczema? Heat rash?

Hi, has anyone ever encountered this? His head has these rashes-scalp-blisters-pus and his body has red dots. It starts with a little red dot then worsened. The doctor keeps saying either hormones/heat rashes and will go off soon. But it seems to be worse. Any tips to handle this? I tried QV moisturizer,milk bath etc #advicepls #pleasehelp #firstbaby #firsttimemom