I’ve been shaving my head for fundraising events as well as my own health-related reasons off and on for ~20 years. My dermatologist suggested a specific face wash and moisturizer/sunscreen for me due to rosacea/eczema/skin allergies, so I’ve been using the same on my scalp whenever I shave it. The brand she recommended to me for both is CeraVe, so that’s what I’ve been using for several years now.