Possible reasons that can cause people to become thinner and thinner, mainly include the following: 1, diabetes, diabetes patients due to increased blood sugar, a large amount of glucose excreted in the urine, the body can be used to reduce the carbohydrates, it will carry out fat decomposition to supply energy, the patient will appear more food, easy hunger and heat, wasting, polyuria symptoms. 2, hyperthyroidism, when patients due to various reasons appear hyperthyroidism, the body 3. Some digestive diseases, such as malignant tumors, especially those in the gastrointestinal tract, liver, pancreas, etc., will cause patients to lose weight gradually due to excessive tumor consumption. Therefore, when the patient eats normally or even eats too much, but has a gradual weight loss, you need to go to the hospital for further examination to exclude the common diseases that can cause wasting.