I've been dancing around my sensitivity to EMF and realized WiFi in my home was causing me problems. I now have my computers hardwired and turned off the WiFi. Headaches are now gone and so is the almost constant burning sensation i had on my left shoulder blade.. it can also cause insomnia. If you have unexplained ailments it might be wise to comsider environmental factors. This modern world comes with its share of unhealthy consequences.