Insomnia plagues a lot of people. If you suffer from one of the many common sleep problems and the solutions aren't helping, consider cooling your hot brain down.
Photo by Vera & Jean-Christophe.
Insomniacs, who seem to have higher-than-normal brain activity that makes the brain "too hot to sleep", were able to sleep almost as easily as other people without sleep disorders when they wore cooling sleep caps. As Time reports, "Cooling off the brain makes sense, since melatonin, one of the more effective medications to help people sleep, also works in part by lowering body temperature."
So, if you have trouble sleeping, it may be worth the investment to get a pillow designed to cool your head or otherwise cool off.