Doctors refer to it as purulent nasal discharge
. It’s this nasty mess that is the problem we are going to deal with
in this book.
• Your sinuses may react to an allergen, such as pet dander, dust, dust mites, pollen, or any other tiny particle you are allergic to, and your immune system will attack it and cause your nasal membranes to swell up and block your sinuses. In the case of pollen, it could be seasonable. A food allergy can also cause this condition.