Acute genyantritis usually arises during acute rhinitis, measles, scarlet fever and other infectious diseases. It can also be caused by a peccant state of the four maxillar molars. Among main symptoms are a sensation of tension or pain in the affected sinus, impaired nasal respiration, rheum, impaired olfaction on the affected side, photophobia and lacrimation. Pain is usually diffuse and indefinite. It can also be localised in the forehead or a temple and always arises at the same time of the day. An examination reveals mucous or mucopurulent discharge in the middle nasal duct (a junction between the sinus and nasal cavity), sometimes the swelling of a cheek and hypostasis of the top or lower eyelid. Palpation of the genyantrum front wall usually produces a painful sensation. The body temperature is high. There can be a chilly sensation. Chronic genyantritis may be caused by recurrent acute inflammations of the genyantrum. It also often results from a long-lasting inflammation of the genyantrum or chronic rhinitis. The disease can be provoked by a deflected septum, close contact between the middle conch and lateral nasal septum and congenitally narrow nasal ducts. From the onset dontogenous genyantritis may be chronic in nature. There are exudative (purulent, catarrhal) and productive forms (polyposis, mural-hyperplastic, cholesteatomic, caseous, necrotic, atrophic) forms recognised. Genyantritis can also be vasomotor or allergic. These types are accompanied by similar symptoms in the nasal cavity.