The lack of hunger may be caused by physiological factors, or it may be caused by hypothyroidism, functional dyspepsia, chronic gastritis and other diseases. 1. Physiological factors: less activity in daily life, sedentary for a long time, then the amount of consumption will be reduced and then cause less easy to hunger. 2. Hypothyroidism: hypothyroidism patients with insufficient thyroid hormones can cause generalized hypometabolic syndrome, appearing every day without hunger. 3. Functional dyspepsia: weakened digestive function, gastrointestinal peristalsis slowed down after eating food takes a long time to digest, so there will be not easy to hunger. 4. Chronic gastritis: will affect the patient’s digestive function, resulting in indigestion, appear not easy to hunger. After eliminating physiological factors, it is recommended to go to the hospital for medical treatment.