The causes of morning heart discomfort generally include inappropriate emotions, high blood pressure, low blood sugar, heart disease and so on. 1. Inappropriate emotions: morning heart discomfort may be caused by inappropriate emotions affecting the heart rate. It is related to prolonged tension, anxiety and other emotions. 2. High blood pressure: According to relevant research findings, the morning is the highest blood pressure throughout the day, so it may be due to high blood pressure resulting in increased cardiac load. This causes heart discomfort in the morning. 3. Hypoglycemia: After a night of metabolism in the morning, it may cause hypoglycemia to appear. Hypoglycemia can easily lead to a decrease in blood oxygen and insufficient blood supply to the heart muscle, which may lead to heart discomfort in the morning. 4. Heart disease: heart disease such as myocarditis, coronary heart disease, heart failure, etc., the condition is likely to lead to insufficient blood supply to the heart, the heart’s operating load increases, which is likely to lead to morning heart discomfort. After the symptoms of morning heart discomfort, it is recommended to go to the regular hospital in time for relevant examinations to clarify the cause.