PN can cause stress, yes.
But the other things in our life that would cause stress
whether we have PN, or not..... those stress issues
can cause immense discomfort and horrific PN flares.

Trying to mentally tune oneself to an attitude that will
allow one's mind to accept stressful situations and not allow
the stress to undermine the effort to be as pain free as possible, is a key.

Yoga helps. Mantras help. Attitude adjustment in many forms, mentally and physically, as well as chemically.....can help.

But it is an absolute that stress hurts!
It does cause PN flares and discomfort as well as
ongoing pain to intensify.
That is a fact, not fiction.