There are two reasons for being sleepy after lunch: the first is that after a morning’s work and study, the body and brain are in a state of fatigue. After relaxing, the patient will show sleepiness. After eating, the peristalsis of the stomach and intestines will increase, in this case, the blood will be redistributed, such as the gastrointestinal tract will be distributed more, which will lead to a reduction in the distribution of blood to the brain, and the patient will also experience dizziness and drowsiness. Napping can improve the fatigue of the patient’s body and brain. It is recommended that patients rest for about 20 minutes after lunch and take a 20-30 minute nap at noon, which can generally relieve the patient’s physical fatigue.