nasal â(plural nasals). 1  An elementary sound which is uttered through the nose, or through both the nose and the mouth simultaneously, such as m and n. ( 2 medicine, archaic) A medicine that operates through the nose; an errhine.
Sinusitis vertigo and dizziness are complications of a sinus infection. Caused by bacteria, a virus, or fungus, sinusitis is inflammation of the sinuses. The sinuses are four hollow cavities in the human skull and are important parts of the immune system as they provide defense against infection. The sinuses are lined with mucous, which expels pollutants and bacteria from the body. It is common for the infection that causes colds to also affect the sinuses and can contribute to dizziness. The dizziness is a result of fluid build-up in the ears that puts pressure on the eardrum and inner ear.
Vertigo can be caused by problems in the brain or the inner ear. 1  Benign paroxysmal positional vertigo (BPPV) is the most common form of vertigo and is characterized by the brief sensation of motion lasting 15 seconds to a few minutes. Head trauma and neck injury may also result in vertigo, which usually goes away on its own. 2  Cervical vertigo can be caused by neck problems such as impingement of blood vessels or nerves from neck injuries. 3  Migraine, a severe form of headache, may also cause vertigo.