Nasal drainage can be clear or colored, thick or thin, come out the front or go down the back. Some nasal drainage is normal, being part of the manner in which the nose, which filters impurities out of the air we breathe, cleans itself. When there is abnormal nasal drainage, we first look for a cause, such as allergy or sinusitis. Sometimes the aging process or medications make the drip so thick it won't clear easily. Sometimes it's just the way we're wired. We will look for the cause and prescribe medicine that can help. A unique treatment which freezes the nerve center that controls the amout of mucus the nose makes can be done in difficult cases.