Drowsiness after meals may be a normal physiological condition, or it may be hypothyroidism, anemia, diabetes, etc. If drowsiness after meals cannot be alleviated through activities, it is recommended that patients go to the hospital as soon as possible to clarify the cause of the disease. 1. Normal physiological situation: just after eating a meal, the blood in the stomach will increase to help the digestion and absorption of food, the brain’s blood supply is relatively insufficient, which will trigger sleepiness after meals. 2. 2. Hypothyroidism: Hypothyroidism is characterized by a low level of thyroid hormones in the body, and the patient will be depressed and drowsy, as well as having symptoms such as loss of appetite and slow heart rate. 3. Anemia: Anemia patients do not have enough red blood cells in the peripheral blood, the blood supply and oxygen supply to the brain will be relatively insufficient, there may be drowsiness after meals, and the patients are often accompanied by symptoms such as pallor and weakness. 4. Diabetes: Patients with diabetes have high blood sugar, abnormal glucose metabolism, the brain does not get enough energy supply, it is easy to appear sleepy after meals, by measuring the patient’s blood sugar level can be clear whether the patient is diabetic.