· The International Headache Society (IHS) has established criteria for "Sinusitisrelated headache", and the revised International Headache Society classification (04) which reiterates the requirement of clinical findings of acute sinusitis, along with a reversible "sinus headache'', represents a very good reference also for ear, nose and throat (ENT) specialists and · A sinus headache results from inflammation and pressure within the sinus cavities of the skull Inflammation of the lining tissues of the sinuses due to infections, allergies, or other irritants causes fluid secretion that can block drainage from the sinuses, causing the sinus pressure within to increaseSinus headaches are usually coupled with other symptoms including stuffy nose, cough, sore throat, and postnasal drip and are caused by those blocked sinus channels Sinus headaches are usually caused by the common cold, allergies, nasal polyps, or by having a deviated septum Dr Art Mollen Is It A M...