The causes of hunger and not wanting to eat are gastrointestinal tract dysfunction, gastric ulcer, fatty liver and so on. 1. Gastrointestinal tract dysfunction: due to long-term dietary irregularities, the patient’s gastrointestinal tract dysfunction, intestinal peristalsis slows down, digestive juices are not secreted enough, and too much food residue is retained in the gastrointestinal tract. As a result, patients have the feeling of hunger, but do not want to eat. 2. Gastric ulcer: Due to the ulcer surface in the stomach, after eating, stomach acid will be produced, stimulating the ulcer area, triggering patients to experience stomach pain. Therefore, when the patient has a feeling of hunger, he does not want to eat due to the fear of pain. 3. Fatty liver: As the patient suffers from severe fatty liver, it will aggravate the burden of the liver or damage the liver function, causing the patient to have an aversion to greasy food. Therefore, even if the patient is relatively hungry, he or she will not want to eat. If the patient is constantly hungry and does not want to eat, it is recommended that the patient go to the hospital in time. Improve gastroscopy, blood tests, ultrasound and other tests to clarify the cause of the disease, and follow the doctor’s instructions for treatment, so as not to delay the condition.