Sinus headaches are the result of pressure built up in the sinus cavity due to inflammation. Sinus headaches are characterized by a throbbing, dull pain, often located behind the eyes, the inner ear, in the forehead or deep within the head. Sinus headaches typically worsen if you bend over or get up quickly, and they sometimes improve during the course of the day, according to the University of Maryland. The most common causes of frequent sinus headaches are chronic sinus infections (sinusitis), allergies, nasal polyps or a deviated septum.
Chronic Sinusitis
Chronic sinusitis affects more than 31 million Americans, according to the National Institute of Allergy and Infectious Disease. Chronic sinusitis is defined as a sinus infection that lasts for more than 12 weeks, but it can last much longer. Chronic sinus infections are typically the result either of a physical deformity in the sinus cavity or severe allergies. The inflammation of and pressure in the sinuses result in frequent sinus headaches.
Allergies
Seasonal allegories can cause frequent sinus headaches. When your body is allergic to a particular substance, such as pollen, it releases high levels of histamine and antibodies to ward off the allergen. A common result of higher histamine levels in the body is nasal congestion, which leads to a sinus headache. If you suffer from seasonal allergies, taking an over-the-counter, 24-hour antihistamine, such as loratadine (Claritin), might prevent frequent sinus headaches.
Nasal Polyps
Nasal polyps are small growths in the sinus cavity that end up blocking the airflow and proper drainage through the nose. Anyone can develop nasal polyps, but they are commonly found in adults suffering from allergies or asthma. Children with cystic fibrosis are more prone to develop nasal polyps as well. Nasal polyps are treated with medication to shrink the growth, or they can be surgically removed. The polyps themselves are harmless, but they commonly lead to nasal congestion, chronic sinus infections and postnasal drip.
Deviated Septum
A deviated septum is a condition in which the wall that separates the nostrils is crooked. This condition develops during normal human growth or can be the result of a facial injury. In severe cases a deviated septum can cut off airflow from one side of the nose, restricting breathing and preventing proper drainage. A person with a deviated septum is more likely to develop sinus infections and congestion, which leads to frequent sinus headaches.
