At the start of diving class the Instructor always have the students complete the medical questionnaire and on an individual basis the Instructor discuss any concerns with each student. More times than not a student indicates problems with equalizing their ears. After a short discussion we find out that the student never really learned how to equalize their ears or suffered from an allergy of some sort or another. Anything else and I refer them to their doctor. So any instructors must never assume that a student has learned proper techniques to equalization prior to coming to the class.
I have seen in many friends the tendency to force the equalization. This is not a good practice and may result in injury. Rather Instructor have to ensure that all students understand that equalization starts before the dive. Divers are instructed never to dive with a cold. Congestion of the sinus cavities makes equalization difficult and those who choose to use one of the many decongestants available at your local drug store risk the possibility of the medication wearing off during the dive. We still have very little understanding of the effects of increased partial pressures on these medications. Decompression Illness is a possible risk of diving with a cold. Don't dive with a cold.
Ok so now we have many techniques available to us to effectively equalize our ears
We can swallow, we can wiggle our jaw or we as most of us do, perform the valsalva. The swallow technique is a gentle way to equalize performed by pressing our tongue against the roof of our mouth and simply swallowing. For some this just is not very efficient. We wiggle our jaw or yawn causing our estasion tubes to flex thus allowing more air to enter our ear drum equalizing our ears. This technique works very effectively at deeper depths were pressure changes are not as great. The valsalva technique although disputed by some as being violent to the inner ears is nonetheless the most widely used and effect technique. The correct method of application is to gently perform the technique more frequently. My Instructor explain that we better use this technique and that it is important they pre pressurize their ears before they begin their descent and immediately after their head comes beneath the water, then every few feet thereafter, never allowing discomfort to occur. He also explain the importance of a feet first descent and to avoid kicking if at all possible. Kicking only causes us to ascend and wreaks havoc on our ears; to prevent this I have them cross their legs, point their toes. We need to know that a descent is a fall to the bottom, but we can control it by leveling out and using our BCD. We should learn that slow descents are perfectly fine and that it is ok to take our time.
Enjoy your dive.
