Although I'm not advocating "stress" or "anxiety" creates PN problems, people with anxiety disorders present with many physical symptoms that are not linked to any organic disease. This is fact.

I have had anxiety issues for years and a laundry list of unexplained physical ailments. Once I addressed the underlying anxiety issue the psychosomatic issues cleared up.

I think doctors see a lot of psychosomatic based ailments so when they see someone suffering with a idiopathic ailment they jump to the psychosomatic conclusion without taking other causes into consideration.

Again not saying PN is caused by a mental process, but the mind is a part of our body and when it is out of whack it can create a lot of physical symptoms that can't be connected to any organic cause.