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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.
Sometimes chest pain may result from overuse or an injury to the chest area from a fall or accident. Viruses can also cause pain in the chest area. Other causes of chest pain include: