Hair loss is typically thought of as a man’s problem, but it’s actually just as common in women—even in their 20s!

If your hair is shedding or falling out when you brush it in the shower, it could be a result of your eating habits, a new medication or stress—importants sign that you need to treat your mental or physical health with more care.

Thinning, on the other hand—in which your scalp becomes more visible—is usually genetic and not reversible. But meds can help, so see your dermatologist.

MORE: Thinning: Secret Side Effect of Your 20s