14 (Yes, 14!) Surprising Reasons You Could Be Losing Your Hair

Last, but certainly not least, your hair may be falling out because you're literally pulling it out. "Trichotillomania is an obsessive compulsive disorder that urges people, as an outlet for handling stress, to pull out their own hair from the scalp, eyebrows or other areas of the body,” Cucinello says, adding the disorder affects approximately 200,000 people yearly.

What you can do: “If you’re affected by this disorder, a doctor can design a custom treatment – usually a combination of behavioral modification interventions and antidepressant medications – to help,” Dr. Russak advises.