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So back to your question: 1  Your chest hurts when you're emotionally sad because your brain processes physical and social pain in the same brain regions (dACC and AI) (the affective aspects of the pain). The fact that both pains overlap means the factors that decrease physical pain also decrease emotional pain.
What Causes Chest Pain? Chest pain is a common symptom of many heart problems, including: Coronary artery disease, which happens when cholesterol builds up on the walls of your arteries. This can make your arteries narrow, or even block them completely, raising your risk of a heart attack or stroke.