Not being full all the time is a subjective feeling that needs to be considered both in terms of dietary patterns and underlying diseases such as diabetes. Being underfed all the time means that there is a constant feeling of hunger, and usually the feeling of hunger is related to the eating pattern and the foods eaten. For example, the pattern of the diet is dominated by high carbohydrates with minimal intake of proteins, lipids, and foods rich in dietary fiber. High-carbohydrate, although you can get a higher sense of satiety in a short period of time, but digestion in the body is generally faster, the feeling of satiety continues to be not very strong, creating an illusion of not being full all the time. Secondly, you need to consider the possibility of diabetes, diabetes is prone to three more and one less, that is, eat more, drink more, urinate more, weight loss, which is mainly due to the human body can not make full use of blood glucose, resulting in the body of the energy shortage and the emergence of a subjective feeling. Therefore, if there is a chronic feeling of hunger, it is recommended to screen blood glucose to detect the risk of diabetes, and if there is no underlying disease for the time being, it is recommended to change the way of eating and have a reasonable diet.