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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.
Chest pain isn't always caused by a problem with your heart, but it can sometimes be a symptom of: 1  angina â where the blood supply to the muscles of the heart is restricted. 2  a heart attack â where the blood supply to part of the heart is suddenly blocked.