Let Alan Mandell show you how to do a couple of weird tricks to drain clogged sinuses. My left nostril was plugged. I tried his technique and am breathing out of both nostrils. I can't believe I was able to drain my sinuses like this.
I implore you not take my experience as medical advice. Before trying this yourself, obtain a medical degree or book an appointment with your favorite otolaryngologist to get the problem diagnosed and treated properly.