The heart may hurt when you cry. There are two clinical situations: 1. In the case of patients with combined severe coronary heart disease, mood swings can cause an increase in heart rate, leading to increased myocardial oxygen consumption. Coronary heart disease has serious lesions, when myocardial oxygen consumption increases the heart can not ensure timely oxygen supply, there will be symptoms of angina, and angina will feel the pressure-like pain in the precordial area; 2, can often be seen without coronary heart disease, especially young women will also feel the pain of the heart when crying, this is because when sad may appear hyperventilation, resulting in excessive exhalation of carbon dioxide content This is because when you are sad, you may hyperventilate and exhale too much carbon dioxide. Carbon dioxide is an acidic substance, exhaling too much will lead to the loss of acid in the body, causing respiratory alkalosis, and respiratory alkalosis will lead to the feeling of chest pain.