The burning sensation in the throat due to pregnancy vomiting is mainly caused by the reflux of gastric juice, which irritates the esophagus. If the number of vomiting is greater than or equal to 3 times a day, the urine is positive for ketone bodies, and the weight loss is significantly greater than or equal to 5%. If the number of vomiting is greater than 3 times a day, the urine ketone body is positive, and the weight loss is significantly greater than or equal to 5%. Generally, the amount of rehydration fluid should be more than 3000ml per day, and vitamin B6 should be given for antiemetic treatment. If metabolic acidosis is combined, sodium bicarbonate should be given to correct the acid, and attention should be paid to the prohibition of diet. Supplementation of amino acids, fatty milk and other nutritional treatment.