Stabbing pain in the region of the heart can be a symptom of both diseases of the cardiovascular system and spine osteochondrosis (thoracic region), metabolic disorders with prolonged intake of alcohol, diseases of the respiratory system, thyroid gland, esophagus, disorders of the nervous regulation of the heart. In this regard, it is better to make appointment with a therapist who will select the required scope of laboratory and instrumental tests, as well as refer to comprehensive examination.