I'm an autie & had some issues with this myself (not this extreme though, but I felt like hair growing under my arms was like needles). Besides the towel bath idea (good one
) would your child be okay with "washing their hair" by rubbing baking soda into it, leaving it in for a bit & combing it out? (Baking soda would get rid of hair odor, possibly cut the acne by cutting scalp oils, etc.) With the acne, my favorite facial wash is by cetaphil (most like water) also, sea breeze on a cotton ball could work. Deodorant ideas: ask your kid if they prefer solid, gel or in between (my guess would be solid but I don't know your kid) & take them to a store & have them open & sniff every single deodorant until they find one they like (embarrassing for you, but possibly fun for him/her
).
_________________
Balance is needed within the universe, can be demonstrated in most/all concepts/things. Black/White, Good/Evil, etc.
All dependent upon your own perspective in your own form of existence, so trust your own gut and live the way YOU want/need to.