Hunger after nap may be related to physiological factors, such as not eating enough, but also to pathological factors such as diabetes and hyperthyroidism. 1. Physiological factors: patients who have not eaten enough at noon, coupled with faster gastrointestinal peristalsis, may lead to the emergence of hunger. 2. Diabetes: Patients with diabetes are not easily digested and absorbed after eating sugar, so they will often feel hungry. 3. Hyperthyroidism: Hyperthyroidism may lead to excessive secretion of thyroid hormones, so there is a rapid consumption of proteins, sugars and other substances, which may also occur. There may be other reasons why you are hungry after a nap, so we recommend that you go to the hospital in time for a relevant examination to determine the cause of the disease and then actively treat the symptoms.