Hi @AaronC9,
Yes, I have definitely seen this with a few people using our PEMF. So far as I can tell, it is not very common, but I would estimate that at least about 1 out of every 500 to 1000 people who use PEMF have reported this kind of electro-magnetic hypersensitivity to me. PEMF users are a pretty self-selecting crowd, so I am not sure how widely this happens in the general population, it could be less frequent than what I see. But also, I suspect that many people simply do not report this to me either, so this type of sensitivity among PEMF users could be significantly more than what I see (about one out of 500 to 1000)
So, yes, this is definitely a real thing. Starting with the C5 and M1, I did my best to widen the power spectrum at the extremely low end to help people who have high e-m sensitivity benefit from PEMF. One of the other things you can do of course to reduce e-m exposure is to put additional layers of padding, bandages, or pillows between yourself and the PEMF source.
You might find it technically interesting to know that the M1/P9/C5 at the lowest intensity levels (about 4 and below) diminish to practically environmental baseline levels of electro-magnetic background. This would be hard to detect using even the most sensitive devices, but some people can sense it nonetheless.