Important Medical Disclaimer: This review is for informational purposes only and does not constitute medical advice. The maxillary sinuses are located behind your cheekbones. Attempting to physically "drain" them requires understanding that you cannot manually empty a sinus; you can only encourage natural drainage by reducing inflammation and thinning mucus. If you have severe facial pain, a fever over 101.5°F (38.6°C), symptoms lasting more than 10 days, or green nasal discharge with a foul taste, see a doctor. Do not attempt home treatment for a suspected bacterial or fungal infection. Understanding the Problem The maxillary sinuses drain through a small opening called the ostium into the middle nasal meatus. When this opening swells shut (from allergies, virus, or irritants), fluid builds up, causing pressure and pain.