The reason for vomiting when eating greasy food is first to distinguish whether it is a physiological problem or a pathological disease. The most common physiological condition is that women who are pregnant will have an early pregnancy reaction and will want to vomit when they smell too much fatty food. If other causes of pregnancy are ruled out, vomiting can also occur when eating. For example, acute and chronic gastritis of the digestive system or liver disease, hepatitis, impaired liver function, gallbladder and pancreatic diseases may cause problems with liver function and various digestive functions, and the patient may not be able to fully digest and absorb greasy food. This may be accompanied by yellowing of the skin, weakness, and even a change in the color of the stool and urine, as well as weight loss. In case of frequent vomiting after eating greasy food and other symptoms mentioned above, patients should go to the hospital immediately for symptomatic treatment.