Vomiting bitter water after pregnancy is a symptom caused by the reduction of gastric acid secretion in the body after pregnancy, which is common in early pregnancy and usually disappears in about 3 months of pregnancy, and some of these symptoms can also occur in late pregnancy. The causes of this symptom usually include: 1. Early pregnancy reaction: Early pregnancy reaction usually occurs in early pregnancy due to the change of hormone level. If nausea, vomiting, loss of appetite and other phenomena are more obvious, it will lead to bile reflux and thus the symptoms of bitter mouth and vomiting; 2, excessive stress: if the phenomenon of bitter mouth and vomiting only occurs in a short period of time, it may be due to more nervousness after pregnancy, poor emotions, unreasonable diet, etc. can lead to vomiting; 3, oral diseases: such as gingivitis, tooth decay, etc., there will also be a bitter feeling inside the mouth, usually 4. Biliary system diseases: If you suffer from chronic cholecystitis, gallstones and other biliary system diseases before pregnancy, the hormone level in your body will change after pregnancy, which will affect the discharge of bile from the biliary system and lead to bile reflux, which can lead to vomiting of bitter water. In addition, bitter mouth and bitter water vomiting may occur with cold, fire, diabetes, etc. If you continue to vomit bitter water, it is recommended to go to the hospital promptly and give active treatment after identifying the cause. It is important to pay attention to a light diet, eat less and more meals, supplement nutrients, and avoid cold, greasy and poorly digested food. Most of the pregnancy reactions can be alleviated through dietary regimen. At the same time, pay attention to moderate exercise to increase the body resistance.