JAW PAIN: A SIGNAL FROM YOUR HEART If you show up at a cardiologist’s office complaining about unexplained jaw pain—especially if it came on out of nowhere—they’re going to pay close attention. Jaw pain can be one of the sneakier signs of a heart problem. In fact, it’s sometimes the only warning sign of myocardial ischemia (that’s when the heart isn’t getting enough blood), even if you never feel a single twinge in your chest Foreman, Annual Review of Physiology . Why does your jaw hurt if your heart is in trouble? It all comes down to something called referred pain. When the heart is under stress, pain signals can get scrambled and end up in places like the jaw, teeth, neck, or even your arm. That’s because the nerves from your heart and from your jaw both send signals to the same area in your spinal cord. Your brain isn’t great at telling the difference, so it might sound the alarm in the wrong spot. Journal of Clinical and Diagnostic Research . What makes jaw pain especi...