There are various causes of nausea and vomiting, mainly including pregnancy, digestive system diseases, cardiovascular diseases, etc., which need to be treated for the causes. A, early pregnancy hormone increase can lead to slow intestinal peristalsis, nausea, vomiting and other symptoms, accompanied by abdominal discomfort, should promptly test the blood HCG value to confirm the diagnosis, to avoid improper use of drugs to damage the fetus, generally after 12 weeks of pregnancy symptoms can gradually ease. Second, digestive system diseases 1, indigestion: simple indigestion can be caused by bad habits, such as improper diet, lack of exercise, gastrointestinal weakness, damp heat can also appear, the gastrointestinal tract slowed peristalsis resulting in food accumulation, can cause nausea, vomiting. Should adjust the diet structure, regular diet, eat more fiber-rich vegetables and fruits, such as celery, cucumbers, apples, while strengthening exercise to stimulate intestinal peristalsis. Drugs can choose gastrointestinal motility drugs such as domperidone, mosapride, etc.; 2. Gastrointestinal diseases: such as gastritis, cholecystitis, pancreatitis, etc. Inflammatory stimulation may cause nausea, vomiting, chest tightness and shortness of breath. Actively control inflammation and take symptomatic treatment such as fasting, fluid replacement, antiemetic and pain relief. Gastroesophageal reflux disease may have delayed gastric emptying, reflux of gastric juice, nausea, vomiting, heartburn, chest pain and other symptoms, and may be treated with acid suppression, such as the use of rabeprazole, omeprazole, etc. Third, cardiovascular diseases such as coronary angina, may have chest pain, shortness of breath, nausea, vomiting and other symptoms, timely electrocardiogram, cardiac ultrasound can detect the condition, sublingual nitroglycerin can be taken to relieve discomfort.