You need to seek the help of a good therapist, as eating your hair can, and does result in hair balls in your intestine, among other things. It's a real disorder and I'm sure any therapist is aware of it and can help you. Even though the Lexapro didn't help, there are other medications for obcessive behavior such as this. Take care....
Well, this is a new one for me! If you just twiddled your hair or sort of pulled on it, I think we just could put that down to a wee nervous habit, but actually eating it has stumped this panel.
You say your doctor put you on Lexapro, which was a bust due to side effects, but unless it was determined that your trichopagia was due to depression, I really don't know what an SSRI would do to help you stop this particular behavior. But then, you notice there is no "MD" after MY name.
I think the best thing you could do is to get hooked up with a therapist to help you figure out why you do this and how to stop.
I wish you the best
Peace
Greenlydia