Sinuses in the face are air the spaces that develop from the nasal passages and help with air humidification and mucus secretion.
Inflammation of the sinuses may decrease the ability for the mucus to drain, increasing pressure within the sinuses and leading to a sinus headache. Common causes of inflammation include allergies, infections, or colds.
Symptoms of a sinus headache include pain in the face that may worsen with bending down or straining;