Not wanting to eat may be suffering from indigestion, which can be characterized by acid reflux, bloating, chest tightness, and belching. Loss of appetite can occur after eating greasy, hard-to-digest food frequently. You can take gastrointestinal tablets for regulation, or have a gastroscopy and follow the doctor’s recommendations for treatment. Do not want to eat may suffer from viral hepatitis, the onset of viral hepatitis will appear in the early stage of a sudden loss of appetite, more aversion to greasy, there will also be general weakness, fatigue, urine darkening symptoms, you can go to the hospital for liver function tests. It may also be caused by mental factors, often in a negative, nervous and restless state, it will affect the appetite. To rule out whether it is caused by disease, you can change the structure of your diet if you are in good health. Eat less greasy and hard-to-digest food, eat more fruits and vegetables, and do some sports appropriately, then you can resume a normal diet.