Sinus Drainage
What is Sinus Drainage?
Sinus drainage, known as post-nasal drip, occurs when the glands inside your nose release mucous to moisturize, cleanse, and protect the mucous membranes. When you experience allergies and other nose conditions, these glands release a higher level of mucous, leading to a runny nose and mucus that runs down your throat. When the mucus escapes into the throat, it can cause coughing, a feeling of gagging, sore throat, and other symptoms.