Showers wipe me out. I'm higher functioning than a lot of people here, I think, but I gave up showers many years ago because they made me feel worse. I do take tub baths nightly. Baths help me relax so I can sleep and soothe the aches. I usually add Epsom Salts.
As for my hair, since I gave up showers, I've been washing my hair in the bathroom sink. I used to do it daily, but now I only do it when I'm going out, or if it gets dirty looking. I noticed that with menopause, my hair stopped getting dirty (oily) as quickly and I could go many days without shampooing. Then, this past year I started taking testosterone shots (my testosterone & other hormones were very low), and I notice that my hair is getting dirty more quickly again. Oh well.