Not wanting to eat at lunch may be caused by physiological reasons such as less exercise, less energy consumption, and late breakfast, but it may also be caused by pathological reasons such as gastritis, gastric ulcer, and gastrointestinal dysfunction. 1. Physiological reasons Eating is to replenish the body’s energy needs, and energy consumption can be carried out through the basic metabolism and a variety of activities, but the movement is too little, consume less energy when the body’s energy is still able to meet the body’s needs, so there will be the phenomenon of the midday meal do not want to eat. In addition, breakfast is eaten late, the body’s food is not fully digested, there will also be symptoms of the midday meal do not want to eat. 2. Pathological causes (1) Gastritis: For patients suffering from gastritis, due to inflammation stimulation may lead to abdominal pain, abdominal fullness and other symptoms, may also appear the symptoms of the midday meal do not want to eat. (2) Gastric ulcer: for patients with gastric ulcer, there may be gastrointestinal dyspepsia, which causes gastric emptying to slow down, resulting in the phenomenon of not wanting to eat the midday meal. (3) gastrointestinal dysfunction: due to excessive work pressure, bad habits, etc., may lead to gastrointestinal dysfunction, which will also be manifested in the symptom of not wanting to eat at noon. If the symptom of not wanting to eat at noon occurs regularly, it is recommended to go to the hospital in time, combined with the relevant items of examination and other symptoms of the patient, to comprehensively determine the cause of the disease, targeted treatment.