Hunger is a normal human physiological response, when the body is reduced or insufficient calories, the body will convey the signal of hunger, was emptied of the stomach will begin to contract, making people feel uncomfortable or even pain. And, with the different degrees of hunger, people will also appear different reactions, in the light hunger, may only feel a little discomfort, but with the rise in the degree of hunger, this feeling will become more and more obvious, but also anxiety, anxiety and other negative emotions appear. And although appetite is a specific expression of hunger, it is not always caused by hunger. However, many people always confuse appetite with hunger. Appetite can be affected by many factors, and hunger is only one of them. It is very common that when we are in a bad mood, we may also have a bad appetite, and even though we may be hungry, we just don’t feel like eating. Of course, some people in a bad mood when the appetite will be better than usual, which varies from person to person. The color, smell and impression of some foods in the mind can also have an impact on appetite. For example, those brightly colored food, food that smells attractive, or food that we have eaten before and feel very good, will cause our appetite, and this appetite is stimulated by external conditions and generated, not because they are hungry. Hunger causes our body to make negative feedback, so we should eat in moderation when we are hungry to ensure stable body function. But the appetite is only due to a momentary interest, and the feeling can actually go away quickly as long as we ignore it. And most people can actually have a very good dieting effect as long as they control their appetite.