Which parasites cause "Negative Thoughts"?

My boyfriend tried using the Zapper for the first time, and noticed he felt very weird afterwards, and increase in negative thoughts.

He also has other psychological symptoms like the following :

distrust in people, fear of abandonment, borderline personality disorder, paranoia, suspicious, delusional/unreasonable thoughts, poor memory, post-traumatic stress disorder, always snooping around in my phone/computer thinking I am cheating on him, etc.

When he is stressed he scratches a lot (scabies?) with dry scabs falling everywhere.

A few months ago after detoxing and taking fish oil, he found it made him "easier to think". I think something must be eating up his brain, LOL.

Any ideas which parasites contribute to this? He otherwise seems physically healthy and well built, other than itching/scabies? and slightly big tummy (he has parasites in there too).