If a patient develops sudden nausea, accompanied by chest tightness and shortness of breath, the following points should be considered: First, firstly, cardiogenic diseases should be considered, such as patients with unstable angina pectoris or acute myocarditis, acute pericarditis, pericardial compression, malignant arrhythmia, or heart failure, when there are clinical symptoms and reactions of chest tightness, shortness of breath, dyspnea, and nausea. Second, for diseases of the digestive system, often in patients with acute gastroenteritis, reflux esophagitis, gastroduodenal ulcer, acute pancreatitis, cholecystitis and other degrees, there will also be nausea, accompanied by vomiting, with clinical symptoms of chest tightness, shortness of breath and palpitations. Third, if the patient has a previous history of significant hypertension, once the blood pressure rises rapidly, or there is grade 3 or higher hypertension, there will be nausea, vomiting, dizziness, headache, and also chest tightness, shortness of breath, and palpitations.