When you are 6 months pregnant and have an upset stomach when you eat, consider pregnancy reaction, uterus pressure on the stomach, stomach disease, etc. 1. Pregnancy reaction: after pregnancy, due to the rise in estrogen levels, women are prone to some early pregnancy reactions, the more common is nausea and vomiting, most of the women’s early pregnancy reactions will gradually disappear in about 4 months, but there are some will continue throughout the pregnancy. 2. Uterus oppression of the stomach: 6 months pregnant, the uterus has been relatively large, will cause pressure on other organs, will lead to gastrointestinal peristalsis slow down, this time there will also be eating on the stomach uncomfortable symptoms. 3. Stomach diseases: Helicobacter pylori infection, mental stress, psychological stress and other factors can lead to digestive diseases, such as chronic gastritis, functional dyspepsia, etc., the appearance of gastric bloating, loss of appetite, early satiety, etc., the appearance of eating the stomach uncomfortable symptoms. There may be other reasons why you have an upset stomach when you are 6 months pregnant, so it is recommended that you seek medical attention to identify the cause of the illness and then treat the symptoms, and you can usually eat smaller meals and keep a happy mood.