I also have had children with a very constant snotty nose. They did go to the doctor but was related to their ears. While we waited on the waiting list for gromits it was just snot after snot. Not alot we could do except remind them to blow their nose. Once the gromits went in we did still have runny noses but much less frequently. Was a very stressful time for me as I felt alot of people were staring and talking about it behind my back. I'd tread carefully.