It is not only foods that cause a runny nose. Te vax can begin an autoimmune process causing the immune systme to over react and begin swelling of the mucus membranes. I found that going paleo reduced the swelling/runny nose problem, but the intestinal tract remains inflamed from the MMR virus, and the ethyl mercury. Yes! That happened to my DD#1, DD#2 is completely unvaccinated. DD#2 literally has never been sick before, 1st B-day coming soon. DD#1 had intestinal problems and allergies, she's had about half of our state's recommended vaccines S.