Most people don't associate jaw pain with cardiovascular trouble, but it's actually one of the telltale signs of heart attack, especially in the lower jaw [source: Mayo Clinic]. However, jaw pain is rarely the only symptom of a heart attack. More often, it is accompanied by sweatiness, fatigue, shortness of breath, and pain or discomfort in the neck, shoulders, and chest.
If you are experiencing jaw pain and you're not sure if it could be related to your heart, try this simple test: Move the jaw around a bit. If movement makes the problem worse, it's probably not a heart attack. Increased discomfort when moving the jaw is more likely to be associated with temporomandibular joint (TMJ) pain or a dental problem [source: Health Central].
If you do experience jaw pain that does not change much with movement, and it is accompanied by symptoms such as chest pain, shortness of breath, or sweating, don't take any chances. Call 911 ASAP. If your symptoms worsen, you could soon be incapable of calling for help. This is also true if you experience dizziness, which is the next symptom on our list.