The causes of lack of hunger in the morning include physiological and pathological causes, and pathological causes are commonly found in gastrointestinal diseases, mental illnesses, liver lesions, and so on. 1. Physiological causes: including eating too much the night before, food can not be completely digested, accumulating in the gastrointestinal tract, causing symptoms of no hunger in the morning. 2. Pathological causes (1) Gastrointestinal diseases: such as peptic ulcer, gastritis, stomach tumor, etc., so that the normal digestive function of the digestive tract is impaired, the food can not be fully digested, and stays in the gastrointestinal tract for a long time, resulting in abdominal pain, abdominal bloating, and then no hunger. (2) Mental illness: When you are tired or under stress, you may experience abnormal mood swings, such as depression, anxiety, etc., which leads to autonomic dysfunction, unable to dominate the gastrointestinal tract, causing gastrointestinal dysfunction and no obvious hunger. (3) Liver disease: hepatitis and cirrhosis may cause liver dysfunction, inhibit bile secretion, reduce digestive ability, nausea, regurgitation and other symptoms, which may lead to poor appetite and malnutrition in the long term or in severe cases. If there is no hunger for a long time, you need to go to the hospital as soon as possible, according to the specific condition of the doctor, to formulate individualized diagnosis and treatment plan, so as not to delay the condition.