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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 can be caused by a range of conditions, from not serious to life-threatening. It may be caused by a heart attack or a blood clot in your lungs. Sometimes chest pain or pressure is caused by poor blood flow to your heart (angina). Infection, inflammation, or a fracture in the bones or cartilage in your chest can cause pain or discomfort. Chest pain can also be a symptom of a digestive problem, such as acid reflux or a stomach ulcer.