When putting your hair up in buns and twists, the primary concern is that the style can cause damage and breakage. It's true that if you're putting your hair through excessive pulling and tugging, your hair can break, but as long as you're as gentle as possible, it doesn't cause a ton of damage. Everything we do damages our hair to some extent, and if the choices are between throwing hair in a messy bun or blow-drying and heat styling, giving your hair a break in a bun is a good choice. No way we do our hair is perfect. We just have to nourish and take care of it as we go.