By Celeste Tolbert, "The Hair Angel," Certified Trichologist Slicked-back buns, snatched ponytails and sleek braids are everywhere right now. They look clean and polished, and I get why everybody's wearing them. But in my chair, I'm seeing the other side of that trend: thinning edges, a hairline that's creeping back, and little bumps along the temples. There's a name for it: traction alopecia. It's hair loss caused by constant pulling on the hair follicle. The good news is that when it's...