If you often do not eat or eat irregularly, the stomach will shrink because there are a large number of smooth muscle cells in the stomach, the stomach is an elastic organ, often do not eat the stomach will shrink. There is gastric acid secretion in the stomach, if often do not eat, gastric acid directly on the gastric mucosa, will lead to gastric mucosa congestion, edema, if serious, there will be erosion or ulcers, it will produce chronic gastritis or gastric ulcer, so you can not often do not eat, in the diet to maintain a regular. If you want to lose weight, you can take a scientific approach, such as controlling the amount of food and exercise methods, but you can not skip meals.