Pain in your teeth, from decay or disease, or pain in your jaw, from tightness or TMJ, can show up as a headache in the top of your head, he explains. It's called "referred pain" and is a very common symptom of dental issues. You should already be seeing your dentist on the regular but if you have a headache that won't quit, it's worth popping in for another check-up. Lack of sleep ruins everything. It can expand your waistline, make you crave junk food, hurt your memory, and make you cranky (not to mention, you know, exhausted). But it turns out that chronic insomnia can also cause chronic headaches. "Unrested muscles can cause tension headaches and insomnia releases stress hormones, both of which trigger headaches," Mikhael says. "A lot of women think headaches are something they must simply endure or treat by taking over-the-counter painkillers like ibuprofen or Tylenol, but not only is that not the best treatment it can even be dangerous as usin