In general, acid reflux from eating greasy food may be caused by pregnancy, stomach diseases such as chronic gastritis, and liver and biliary system diseases such as chronic hepatitis. 1. Pregnancy: chorionic gonadotropin increases and estrogen and progesterone change during pregnancy, which may cause nausea, vomiting and other symptoms, especially when eating greasy food, which can cause acid reflux, stomach bloating and other reactions. 2. Stomach diseases: such as chronic gastritis, gastric ulcer, reflux esophagitis, etc. When eating greasy food, it stimulates the gastric mucosa to cause a large amount of secretion of gastric acid, and due to the damage of the gastric mucosa, it causes a decline in digestive function, slowing down of gastric peristalsis, and a large amount of food stagnation in the stomach, which causes acid reflux, heartburn, gastric pain, gastric bloating and other gastric discomforts. 3. Hepatobiliary system diseases: such as chronic hepatitis, cirrhosis, cholecystitis, cholelithiasis, etc., greasy food needs bile and other digestive juices for digestion, due to liver metabolism abnormalities caused by bile production abnormalities or bile discharge obstacles, resulting in dyspepsia, which can lead to acid reflux, vomiting, abdominal pain and even jaundice, and other symptoms occur. Acid reflux from eating greasy food is recommended to consult a doctor in time for a clear diagnosis and targeted treatment.