Ear and sinus barotrauma can strike any diver, regardless of experience. Try these pressure equalization techniques:
Valsalva Maneuver--The most common ear-clearing technique, this maneuver involves holding the nose, closing the mouth and blowing gently. This raises the pressure in the pharynx, forcing air up the eustachian tubes into the middle ear. Avoid forcefully performing this manuever since it can damage the inner ear.
Toynbee Maneuver--Performed by holding the nose and swallowing simultaneously. The eustachian tubes open momentarily, allowing air to enter the middle ear. This technique may also relieve reverse squeezes.
Frenzel Maneuver--This nontraumatic method of adding air to the middle ear is accomplished by closing the nose, mouth and glottis voluntarily, then driving the tongue backward, which acts as a piston to compress air into the nasal cavities and through the eustachian tubes.
Yawn & Swallow--This simple maneuver is accomplished by thrusting the lower jaw forward and slightly opening the jaw, while keeping the lips pursed around the regulator, and swallowing.