Since the maxillary sinuses are located in the cheeks, sometimes lying flat causes mucus to pool. You can use gravity to help move things along.
Elevating your head while sleeping can help to reduce congestion and promote drainage of the maxillary sinus. To elevate your head: how to drain maxillary sinus at home
Nasal irrigation is a technique that involves flushing the nasal passages with a saline solution to remove mucus and debris. To perform nasal irrigation: Since the maxillary sinuses are located in the
The maxillary sinuses drain through a small opening called the into the middle nasal meatus. When this opening swells shut (from allergies, virus, or irritants), fluid builds up, causing pressure and pain. fluid builds up