Fast hunger and less stool may be due to constipation, diabetes, hyperthyroidism and other reasons. 1. Constipation: Eating less, consuming less food fiber and drinking less water will reduce the stimulation of the intestines. Intestinal peristalsis will slow down, leading to constipation and fast hunger as well as fewer bowel movements. Pay attention to a balanced diet and consume enough water to promote bowel movement. 2. Diabetes: Glucose in the blood cannot be utilized by the body and is excreted in the urine. Tissue cells will consume their own proteins and fats to supply energy if they lack energy, leading to fast hunger. In addition, diabetes is prone to autonomic neuropathy, including dry stools and other conditions, sometimes leading to less stool. 3. Hyperthyroidism: patients with increased hormone metabolic rate, excessive nutritional consumption, resulting in patients appearing easy to hunger. If you are hungry and have fewer bowel movements, you need to consult a doctor in time for further examination to clarify the cause of the disease and follow the doctor’s instructions for standardized treatment.