The symptoms of nausea and vomiting after staying up late are caused by brain fatigue and brain nerve dysfunction, because brain fatigue will stimulate the sympathetic nerves of patients, resulting in the excitement of the gastrointestinal tract of patients, and the symptoms of nausea and vomiting will occur. For this situation, it is recommended that patients should rest, generally through rest after the patient’s dizziness, nausea, vomiting symptoms can be alleviated. Patients should pay attention to avoid staying up late, because often staying up late is not good for the health of the body, resulting in a decline in the patient’s physical condition, prone to colds, and pneumonia and other diseases. During the day, the body will be more sleepy and weak, and the concentration is not good. The patient’s memory will also be diminished or in a subhealthy state after a long stay up late, which is not good for the patient’s body and usual work.