what causes double sneezes
A sneeze, or sternutation, is a semi-autonomous, convulsive expulsion of air from the lungs through the nose and mouth, usually caused by foreign particles irritating the nasal mucosa.he force and extent of the expulsion of the air through the nose varies. Sneezing can not occur during sleep due to REM atonia-a bodily state wherein motor neurons are not stimulated and reflex signals are not relayed to the brain.