I think a person can have OCD from mercury, but being paranoid about mercury exposure is because of the untold suffering certain people have endured, even from minimal exposure. This then causes extreme fear of any future exposure, which I think is rational under the circumstances. To others it would seem over the top, or irrational, but for me? If I had listened to my paranoia more often retgarding mercury, I may have savedmyself from becoming repoisoned by going to see a dentist a few months back, whom I trusted. His office was supposedly fixed with a sophisticated extraction system, all designed to reduce or eliminate mercury vapor from his environment. I went in for consultation, evaluation (I do not have amalgams) and I was repoisoned, I'm now living in a stupor with suicidal thoughts daily, constantly afraid, so ill I can hardly function anduanble to even feed myself properly.