If you don’t eat breakfast in the morning and are not hungry at noon, you may have an irregular diet or suffer from some kind of disease, such as incomplete intestinal obstruction, chronic gastritis and so on. 1. Irregular diet: may be the night before eating too much late-night snacks, resulting in intestinal food is not completely digested, or daily meals and diet irregularities and other factors, resulting in intestinal peristalsis is too slow caused by not eating breakfast in the morning at noon not hungry. 2. Incomplete intestinal obstruction: if the body suffers from incomplete intestinal obstruction, the stool can not be discharged from the body, will lead to slow gastrointestinal peristalsis, which affects the normal metabolism of food, and there will be the case of not eating breakfast in the morning and not hungry at noon. 3. Chronic gastritis: may be a long time to drink, irregular diet or eat too much stimulating food and other factors, leading to chronic inflammatory changes in the gastric mucosa or atrophic lesions triggered. Typical symptoms will show epigastric pain, epigastric discomfort, loss of appetite and other symptoms. When the symptoms are severe, it can also lead to the phenomenon of not eating in the morning and not being hungry at noon. Can cause the morning do not eat breakfast at noon is not hungry for more reasons, if this phenomenon often occurs, but also need to go to the hospital for relevant examinations, for the cause of the treatment.