The area between the two nipples against the top is the sternum. If you experience pain behind the sternum, you should first consider a heart attack. The general heart disease involved in retrosternal pain is mainly angina pectoris or heart attack. In the case of angina or heart attack, the patient will experience severe pain behind the sternum in a crushing pattern. In the case of heart attack, this pain will persist for a long time and will not be relieved, and the patient will have difficulty breathing and a feeling of frequent death. In this case, the patient should go to the hospital promptly, where the diagnosis can be made by electrocardiogram examination and blood sampling for cardiac enzyme profile. In some patients, a definite diagnosis can be made only through cardiac CT imaging. If it is found to be a heart attack, it should be promptly sent to a chest pain center for resuscitation. When it comes to treatment, the current treatment for heart attack is generally based on stent placement. In addition to heart disease, if there is pain in the line between the two nipples, there is also a possibility that the pain is caused by a strained chest muscle or a lesion in the skin of the chest, and a clear diagnosis can be made through general examination.