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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.
Ask yourself if your chest pain changes in intensity or goes away completely when you change your body position to determine the cause of the discomfort. Muscle strains and GERD-related chest pain tend to feel better when you move your body.