Being able to hear the sound of your heartbeat may be normal, such as at night when it is quiet and exercising; it may also be abnormal, such as suffering from hyperthyroidism and heart disease. 1. Normal: The heartbeat has a sound, and when there are sounds around during the daytime activities, you usually can’t hear it at this time. When sleeping at night, the surrounding silence, then the heartbeat may be heard. In addition, if you do strenuous exercise, the heartbeat is enhanced, you may also hear, these are normal. 2. Abnormal: If you have hyperthyroidism, anemia, mitral valve insufficiency and other diseases, you may also hear the sound of your heartbeat. At this time, you should go to the hospital for examination, a clear diagnosis, according to the cause of the disease to take corresponding treatment. The normal beating of the heart is very important to the human body, if there is panic, chest tightness and other symptoms, it is recommended to seek medical attention as soon as possible, so as not to delay the condition.