A.,
That runny nose is an immune system problem - here are some things that you can check out to give her immune system as much support as you can from home:
Plenty of regular rest - bed same time, nap same time
Almost NO sugar
Almost NO white flour - use 100% whole grains instead
Ridding your house of harsh chemicals like you find in Tide, Windex, Downy, bathroom cleaners - and even some personal care products...lotions, shampoos, etc. Yes, even Johnson and Johnson uses harsh chemicals - not enough supposedly to hurt anyone...but even the American Lung Association is saying we need to find safer cleaning and personal care products. We are breathing too many toxins for too many years. I have a friend that, although grown, went through a sinus ordeal like this - even tried surgery. Her problem cleared up the very week she switched to no-harsh-chemical products from a wellness company called Melaleuca.
Plenty of fluids - water or juice really dilluted with water.
Quality vitamins - not Flinstones and such. My daughter orders hers from a company called Shaklee for her two year old.
I raised three healthy kids - and maybe their immune systems were stronger than all those around them, but I don't think so. I think it's because we followed the above suggestions most of their lives. They are adults now...and they testify a difference when they do the above and when they don't. Your whole family will benefit...
Only hoping to enhance your life..J.