There are many pros to styling your hair in a slicked-back ponytail or bun — it’s relatively easy to do, doesn’t require you to wash your hair beforehand and helps you achieve a sophisticated look. But there’s one major drawback: Repeatedly wearing your hair in tight, slicked-back styles can lead to hair loss, according to experts. Even if you pamper your hair with the best shampoos and conditioners , scraping it back can still wreak havoc. I spoke to two doctors to find out why your hair might