Hmmm, it was within a week or two of getting AirPods Pro (and heavily using the noise cancelling mode) that I developed a strange dull ache/pressure throughout

Hmmm, it was within a week or two of getting AirPods Pro (and heavily using the noise cancelling mode) that I developed a strange dull ache/pressure throughout my sinuses and upper jaw. Stopped using noise cancelling and it seems to have improved a lot but hasn’t completely gone away. Some googling suggests noise cancelling tech has negative side-effects for quite a lot of people. I strongly suspect that many others must be suffering from environment-/diet-/tech-induced ailments but are simply not inquisitive enough to experiment and identify the sources of discomfort.