How long can a kid's nose run with thick mucus...1 month?!

Hummmmm let's see, my 2 X 2 yo started here in october 2011 with a runny nose, and guess what, they still have runny noses today! I chase them with tissues, I try my best to protect the toys, the other kids ans my couch hahaha! But doesn't always work!

There's not much a doctor can do!