I have trichotillomania. It comes out in two ways: searching my eyelashes for a loose one and pulling it out (so satisfying) and cutting my hair.

Cutting hair is apparently on the rare end of the Trich spectrum and falls into an obsession with symmetry. When I get down, I start feeling like it is time to cut my hair. Fortunately I am good at it, and look good with very short hair (I'm a woman) and so nobody is any the wiser.

The eyelash pulling stopped after I was diagnosed at 38 with Bipolar and went on anti-depressants.