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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.
The pectoralis muscles are the largest muscles on the chest wall but there are several other muscle pairs present. These muscles can be easily strained with exertion. Chest wall injury is more likely to lead to a bruised feeling or even a stabbing sensation rather than a squeezing chest pain. However, chest wall problems should be considered when there is superficial pain (pain on the surface). Angina. Angina pectoris is heart-related chest pain caused by insufficient blood supply to the heart muscle.