The fast hunger after eating may be related to irrational diet structure, high energy consumption, hyperthyroidism and abnormal gastrointestinal function. 1. Unreasonable dietary structure: If you eat a lot of meals that are easily digested and absorbed, such as noodles, soup, porridge, etc., you may get hungry quickly after eating. 2. Large energy consumption: daily work pressure intensity, exercise, etc., resulting in rapid energy consumption after eating, thus leading to fast hunger. 3. Hyperthyroidism: Hyperthyroidism patients due to their own thyroid hormone levels are too high, resulting in the body’s metabolism and thermogenesis and other functions are stronger, thus promoting gastrointestinal peristalsis, faster digestion and absorption of the meals eaten, the symptom of fast hunger after eating. 4. Abnormal gastrointestinal function: If the patient’s gastrointestinal function is abnormal, resulting in fast gastrointestinal peristalsis, so that the ingested food is not digested and absorbed that emptying, then there will be a situation of fast hunger after eating. There may be other reasons why you are hungry after eating, so it is recommended that you go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.