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I do think this is different for everyone. Because my trich is not related to anxiety or other difficult life issues, when my parents made me undergo counselling with a number or practitioners as a teenager, no good came of it. However, it has helped others.
I've been put on Prozac - stopped it because it didn't help my hair and made me feel robotic.
I've tried hypnosis and behavioural modification treatment. No good either.
That said, those treatments have and continue to help others. There is no one size fits all.
My help has not been medical, but rather interpersonal, with a supportive partner.