What is the most common type of squeeze experienced by divers?

The most common type of squeeze experienced by divers is the middle ear squeeze, also known as barotrauma of the ear. This condition occurs when there is a difference in pressure between the middle ear and the external environment that the diver fails to equalize. During descent, water pressure increases, and if the Eustachian tubes (which connect the middle ear to the back of the throat) do not open properly, it prevents air from entering the middle ear to equalize the pressure. This leads to discomfort, pain, and potential injury to the eardrum if not addressed.

Divers commonly experience this issue due to the nature of diving where pressure changes occur rapidly as they descend and ascend. Unlike other types of squeezes, such as sinus squeeze or barodontalgia, middle ear squeeze happens more frequently because most divers are trained to handle pressure changes affecting the environment, but the middle ear requires specific techniques for equalization, which can be overlooked or improperly executed. Thus, understanding the mechanism and prevention of middle ear squeeze is essential for safe diving practices.