Pain at the xiphoid process and chest tightness may be due to respiratory, cardiovascular or digestive system diseases. 1. Respiratory system diseases: such as pleurisy, due to a variety of pathogenic bacteria invade the pleura and lead to a series of inflammatory reactions, the patient may be manifested as tightness in the chest, dyspnea, pain in the raphe, fever, cough, etc., you can use metronidazole tablets to fight infection, but may cause nausea, loss of appetite, itching, numbness of limbs and other symptoms, the central system and blood disorders are prohibited for patients. 2. Cardiovascular system diseases: such as myocardial infarction, when the coronary artery obstruction blood supply is insufficient, resulting in myocardial ischemia and necrosis, the patient will have pain at the xiphoid process, chest tightness, chest pain, etc., can be used to dilate the tube of nitroglycerin treatment may cause dizziness, suction yah, and other adverse effects of severe tachycardia and serious hypotension in the early stage of myocardial infarction, is prohibited. 3. Digestive system diseases: such as acute gastroenteritis, various causes of acute inflammation of the gastrointestinal mucosa appear abdominal pain, diarrhea, sometimes accompanied by pain in the raphe, chest tightness, etc., to pay attention to dietary control and rehydration, the use of gastrointestinal mucosal protection agent treatment, such as aluminum sulfate, etc., a few patients may be constipated, contraindications are not clear. If there is pain in the raphe and chest tightness, it is recommended to consult a doctor in time, after clarifying the cause of timely treatment, drugs need to be used under the guidance of a doctor, do not self-medication.