Is this bullshit or just some remote but somewhere scientifically accepted (even if maybe outdated) theory?

Schizophrenia and schizoid personality disorder are defined by abnormalities in at least one but usually several of five key characteristics:

  1. Delusions

  2. Hallucinations

  3. Disorganized thinking and speech

  4. Abnormal motor behavior

  5. Negative symptoms

With a schizoid personality disorder, the presence of one or more delusions must persist for at least one month before a diagnosis can take place.

[…] delusional themes like an individual having delusions of infestations and feeling the hallucinatory sensation of insects all over them.

(Source)

I mean … honestly?!