Yes, there are food triggers galore.

But one reason that I think night time is more painful for some is that during the day, walking around, you are predominately using the proprioception fibers, which are the fastest of the 4 types of afferent cells in the feet. They get priority in the brain because you need to move and know where to move to and from.

When you lie down, they stop for the most part, so the slower fibers then become more noticeable.

Here is a link explaining the types of fibers and their speed...
http://faculty.washington.edu/chudler/cv.html
Our Subforum has many informational threads that can help you understand PN better.

Try using the Biofreeze or the new Salonpas Deep Relieving gel...at night. They have menthol in them, which blocks the heat fibers by stimulating the cold ones. This can reduce your burning and pain considerably. Salonpas Deep Relieving Gel is at WalMart now (new) and Biofreeze is at Amazon or iherb. Use the gel and not the roll on...as it works better.