I am assuming this is because you are using it on your head… using ICES-PEMF elsewhere on the body generally does not cause headaches.
Generally speaking, based on the clinical observations of people’s responses when Dr. Pawluk and I were studying the effects of ICES-PEMF when used on the head of people after they were diagnosed with chronic mTBI, we found that for the first few days some people had mild headache pain. This tended to dissipate after a few days of regular use.
If toughing it out like that (as suggested by Dr. Pawluk) would not work for you, then consider doing the following:
1- Reduce the frequency of the pulses you are using (above about 15 pps can be irritating)
2- Reduce intensity (generally start with a low setting and build up)
3- Reduce the time and or frequency of use.
From these lower-energy-exposure initial starting points, you can slowly build up intensity and exposure time based upon your individual response and tolerance.