Aerosinusitis, also called barosinusitis, sinus squeeze or sinus barotrauma is a painful inflammation and sometimes bleeding of the membrane of the paranasal sinus cavities, normally the frontal sinus. It is caused by a difference in air pressures inside and outside the cavities. Most cases occur in scuba divers and fliers, and is easily diagnosed when presented to physicians immediately after exposure.On the other hand, the problem may remain undiagnosed when the history fails to relate the symptoms to exposure to environmental pressure changes or if the focus is on other etiologies.This paper reviwed the sign and symptoms , diagnosis of barosinusitis

Key words- Barosinusitis, flying, pressure