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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.
Some heart attack sufferers don't experience chest pain at all. While chest pain is far and away the symptom most commonly associated with a heart attack, not everyone who has a heart attack feels that crushing chest pain. Women, for instance, tend to have different heart attack symptoms than men.