Some foods are histamine releasers. Tomatoes for example.

http://foodallergies.about.com/od/co...amineintol.htm

and list:
http://www.urticaria.thunderworksinc...htm#foodsource

I find that potatoes make my feet burn! I found this out 3 yrs ago. The nightshade family of veggies is hard to tolerate for some people. They also contain solanine, beside the histamine problem.

Also depending on what you ate ... if there is sugar or starchy carbs in that meal, you can get increased burning or other foot symptoms. Sugar spikes insulin and high insulin stimulates PGE2 cytokines which dilate blood vessels.

A high sugar + fat intake such as ice cream, will increase the viscosity of the blood, and reduce circulation in the tiny vessels of the hands and feet, and induce pain sensations in those with high protein levels in the blood. (MGUS). High fat meals have shown in normal volunteers in studies to be very damaging by increasing the viscosity of the blood for HOURS.

People can have impaired glucose tolerance for years, as insulin resistance and still present with "normal" fasting morning glucose tests. But this condition is already leading to PN.

http://www.citeulike.org/user/wrs1/article/6499468