Nausea on eating greasy food may be related to pregnancy, stomach disorders, liver disorders and so on. 1. Pregnancy: When a woman is pregnant, the hormones in her body change and so does her appetite. Nausea occurs when eating greasy food. It is recommended to take a pregnancy test to determine whether you are pregnant and how pregnant you are. 2. Stomach disease: Patients with stomach disease usually have stomach discomfort, which can affect normal appetite and even nausea when eating greasy food. 3. Liver disease: If you suffer from liver disease, your liver’s digestion of fat will be impaired, and eating greasy food will increase the burden on your liver, which can be manifested as nausea after eating greasy food. There are many other reasons for nausea after eating greasy food, if the symptoms are serious or continue to not get better, it is recommended to go to the regular hospital in time, after clarifying the cause of the disease, under the guidance of the doctor for targeted treatment.