What happens if a diver fails to equalize pressure in their ears?

When a diver descends underwater, the pressure around them increases. This increase in pressure can cause discomfort in the ears if the equalization of pressure between the external environment and the middle ear does not occur. If a diver fails to equalize properly, the pressure in the middle ear can significantly differ from the external pressure, potentially leading to barotrauma. This condition involves injury to the ear due to the unequal pressures, which can result in pain, temporary loss of hearing, and other complications if not addressed. Hence, it is crucial for divers to perform equalization techniques regularly during their descent to prevent such injuries and ensure a safe and comfortable dive.