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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.
Call 911 if you have any of these symptoms along with chest pain: 1  A sudden feeling of pressure, squeezing, tightness, or crushing under your breastbone. 2  Chest pain that spreads to your jaw, left arm, or back. 3  Sudden sharp chest pain with shortness of breath, especially after a long period of inactivity.