Heart pain may be caused by angina and other heart diseases, gastritis and other digestive diseases, or bronchitis and other respiratory diseases, not a precursor to a particular disease, and you should seek medical attention to identify the cause of the disease. 1. Heart disease: coronary heart disease, myocarditis, pericarditis, etc. may cause pain in the mouth of the heart, in addition to aggravated by exertion or fever, diarrhea, dyspnea and other symptoms, which require timely treatment, otherwise it may be life-threatening or aggravated. 2. Digestive system diseases: gastritis, gastric ulcer, reflux esophagitis, etc. may also cause pain in the heart and mouth, which may be accompanied by nausea and vomiting, black stool, epigastric discomfort and other symptoms. After timely and effective treatment, it can be cured, but gastric ulcer has certain risk of cancer and needs to be alerted. 3. Respiratory diseases: bronchitis and pneumonia may cause pain in the heart and may be accompanied by coughing and sputum; pneumothorax and pleurisy may also cause it, accompanied by aggravation when taking a deep breath. These diseases can be cured, but recurrent episodes may occur. If you have heart pain, please go to the hospital and follow the doctor’s instructions for appropriate treatment to avoid aggravation of the condition and poor healing.