The sudden increase in meal size should be noted in the following cases: 1. The sudden increase in meal size may be due to increased consumption, such as participation in strenuous physical labor or exercise, and the meal size will suddenly increase when consumption increases. 2. Pathological conditions, such as diabetes, when blood sugar cannot enter the cells to be used effectively by the body, the body will have an enhanced sense of hunger and the meal size will suddenly increase. This is the time to go to the hospital to check fasting blood sugar and two hours after meals and glycated hemoglobin to screen for diabetes. 3, hyperthyroidism, the thyroid gland is a gland in the neck of the human body, secrete hormones called thyroid hormone, the role of thyroid hormone is to promote human metabolism, if the amount of food suddenly increased, we must check the function of the thyroid gland to exclude hyperthyroidism. 4, tumors, some tumors human body can not be effectively used by the body, In the case of tumors, some tumors increase the consumption of the human body, and the amount of food will also increase suddenly, it is recommended to go to the hospital for a systematic physical examination.