Other risks are those similar to those with diving disorders.  Pressure changes can cause barotrauma, also called “squeeze” which refers to physical damage to body tissues caused by a difference in pressure between an air space inside the body and the surrounding fluid.  Susceptible areas and structures in the body include the lungs, behind the eardrum, inside paranasal sinuses, and underneath dental fillings.  This is a result of the fact that gases are compressible but tissues are not.