Hair loss is a very personal topic—one that affects millions of people, but often goes undiscussed. The list of reasons why your hair could start to fall out is extensive, but when it does most women’s minds go straight to one thing: alopecia. The problem is most of us don’t really understand alopecia. Since the idea of losing your hair is—let’s face it—scary, and September is National Alopecia Awareness Month, it’s time we all educated ourselves on the disease that affects of 6.5 million Americans. Keep reading to find out if your hair loss is actually alopecia and what you can do about it.