You can take the following measures if you have severe pregnancy sickness: 1. Eat small and frequent meals, avoid fasting, and eat light, dry and high-protein foods. 2. Try to avoid contact with smells, foods or additives that tend to induce vomiting, and do not eat foods that are too salty or greasy. Foods such as cookies, bread and soda crackers can reduce the discomfort of pregnancy vomiting. After eating dry snacks, you should drink water after an hour.3. Take proper intake of vegetables and fruits to help replenish electrolytes and trace elements in the body and improve the symptoms of pregnancy vomiting.4. Keep the indoor air fresh, open the windows frequently for ventilation and go to odorous places less often.5. Take small doses of vitamin B6 to relieve pregnancy vomiting. In case of severe pregnancy vomiting, you need to be hospitalized for intravenous rehydration, urine volume >1000ml per day, and supplementation of vitamin B6, vitamin C, potassium chloride, etc.