You could have a sodium channel mutation (such as SCN9A) that makes you highly p...

You could have a sodium channel mutation (such as SCN9A) that makes you highly pain tolerant, but lidocaine-resistant[0].

It's a known syndrome, and may be associated with ADHD symptoms, episodes of intense skin flushing or redness (erythromelalgia) and epilepsy.

Other medical sources:

  https://www.ncbi.nlm.nih.gov/books/NBK1163/
  https://www.ncbi.nlm.nih.gov/books/NBK481553/