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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.
In some cases, chest pain is caused by an illness or injury that has nothing to do with your heart. For example, you can have chest pain if you have pneumonia, indigestion, or a broken rib. Because chest pain is commonly linked to heart problems, itâs important to talk to your doctor about any chest pain you feel, even if itâs very mild.