Instead of counting your losses (literally), making some lifestyle changes to your bedtime routine can make a huge difference. For starters, it can prevent hair damage to your hair (PSA: A lot of hair damage happens at night). And because your epithelial hair follicle stem cells are set into action while you sleep, the right care will significantly assist the process of your overall hair growth. RELATED: The Benefits of a Hot Oil Treatment for Hair—and How to Do It Yourself And contrary to popular belief, Gillen recommends staying away from sleep caps (unless they’re made of silk). “They can be too tight on the head and rub generally in one area, which can pull hair out from the roots and damage your hair follicle,” he says. “It also goes against the idea that you want less friction while sleeping.”