Please ask this question at our Gluten forum.

Cara (jccgf) is very experienced with this and has a website with enormous amounts of information.

There are studies and people she has known who have gluten intolerance with few GI symptoms, and negative blood work.

http://neurotalk.psychcentral.com/forum13.html

If you have been off all alcohol for a year, I'd not suspect it anymore. But chronic PNs that do not respond to treatments, may end up as gluten induced( from diet).

Doctors LOVE to pin everything on an obvious diagnosis. They may then ignore anything else you offer or suggest, even symptoms. (sad but true). Just Google "wrong diagnosis statistics"! Some doctors even think PN symptoms are all in your "head"... psychogenic! If you are female this is more common, but it exists too.

If you cannot get the help you need from your doctor, and feel stuck, then you can surely do some things for yourself, starting with a gluten free diet.