A sinus headache is a type of headache that is caused by inflammation of the sinuses. The sinuses are air-filled cavities in the skull that are lined with mucous membranes. When these membranes become inflamed, they can block the drainage of mucus from the sinuses, leading to pain and pressure in the face and head.
Sinus headaches can be caused by a variety of factors, including allergies, colds, and flu. They can also be caused by structural abnormalities in the sinuses, such as a deviated septum or nasal polyps. In some cases, sinus headaches can be a sign of a more serious underlying condition, such as a sinus infection or a brain tumor.
