That the featured sufferers never even seem to consider the idea that it is a neurological disorder of a sort makes me question their ability to reason.
If I was hallucinating and felt bugs crawling all over for years, I would at least try an approach by a psychiatrist. Especially considering that many people with the same symptoms are rampant alien/conspiracy theorists.
Looking at the ridiculous amount of antibiotics they are taking, it would be just as feasible to try an antipsychotic or something.