Not drinking a large stomach may be due to improper diet, digestive diseases and female pregnancy and other conditions, need to be specifically analyzed. 1. Improper diet: usually eat too much greasy food leading to obesity will appear belly, long-term eating junk food, leading to excessive visceral fat, fatty liver, at this time will also appear belly. 2. Digestive system diseases: clinically, when acute hepatitis, chronic hepatitis, liver failure and other diseases, the patient has ascites, so it will also show a big belly. 3. Female pregnancy: If a woman has a history of sexual intercourse and her period does not come on time, she needs to consider the possibility of having a big belly because of pregnancy. There are many other reasons for a large stomach without alcohol, if you feel unwell, it is recommended to go to the hospital in time.