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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: When Your Heart Hurts. Chest pain can be caused by many different conditions. In some cases, chest pain can be a sign of a life-threatening heart condition. In other cases, chest pain may actually stem from an issue with other organs, such as your lungs.