When people are aggrieved and sad, they will cry, and at this time most of them will be emotionally agitated, causing an increase in heart rate and blood pressure, which will affect normal breathing and increase the burden on the heart, which will relatively lead to ischemia, hypoxia, chest tightness and a feeling of breathlessness. At this time, there will also be more exhaled gas and less inhaled gas, which will also reduce the amount of oxygen in the alveoli and cause the above symptoms, which will be aggravated when the heart and lung function is usually poor, and will also easily lead to hyperventilation causing respiratory alkalosis. Patients can be stabilized and rested in bed, which in most cases can be relieved, and if the symptoms are more serious, oxygen can be administered in appropriate amounts.