We are often asked which side to treat with BPPV. This answer is relatively simple. The Dix-Hallpike maneuver is the standard test for BPPV. Basically what happens is that you lie down fast on your back and turn your head to one side (ideally looking up a bit too). After about 30 seconds have passed you will either be dizzy or have no reaction. In this example if you are on your left and you get dizzy on that side then you have left sided BPPV. The same is true vice-versa. Obviously you treat the side on which you have BPPV. However about 10% of people have BPPV on both sides or it is not clear on which side they have BPPV because they didn’t get dizzy during the test but do other times.
The answer to the question about treating both sides is a bit more complicated. If you have BPPV on both sides or are not sure which side you have BPPV then you can indeed treat both sides. People often ask if you can “undo” the Epley maneuver by treating the left side immediately after treating the right side. No you can’t. However, you can cause yourself to be more nauseous and may even throw up. Even worse you run the risk of converting posterior BPPV to horizontal BPPV. What is that you ask,… Well usually people have Posterior canal BPPV meaning the crystals are in the back most balance canal. When you do the treatment maneuver the crystals come out of this canal and float back into the vestibule of the vestibular apparatus (the balance organ). If you get a lot of these crystals floating around in there and then start rolling around again they can float into another balance canal – the horizontal canal. This is actually a much worse feeling BPPV. Luckily it is easily treating by a log roll (something you might accidentally do in bed) so it usually doesn’t last very long.
So in summary we suggest getting a proper diagnosis for BPPV – and treating the appropriate side. If you are unsure on which side you have BPPV or have it on both sides we suggest treating one side for one week then treating the other side for the next week. This avoids confusion as to the diagnosis and also avoids nausea and conversion to Horizontal BPPV.