If heart discomfort occurs after a severe shock, this is easier to explain. First of all, when a person is suddenly shocked, the sympathetic nerves are abnormally active, and the heart beats rapidly. This situation excites alpha and beta receptors. That’s why people feel panicky, mainly because of the sudden acceleration of the heart rate. That’s why it’s easy to explain the discomfort of the heart after a shock. It is mainly because there is an acceleration of the heart rate, and it is very sharp, so there is a feeling of panic and palpitations, which is also easy to understand. It is mainly a problem of sympathetic nervous regulation, and usually can be relieved by resting for half an hour or an hour or so. Therefore, the discomfort of the heart after a shock is mainly due to the sympathetic activity, which causes the heart rate to accelerate, so there will be discomfort of the heart.