The causes of sleepiness, nausea and vomiting in patients may be due to the following reasons: 1. Most commonly, many people will experience sleepiness, nausea and frequent yawning when they stay up late, stay up all night and their brains are in a state of extreme fatigue, and the patient’s reaction will be sluggish and inattentive. 2. If the symptoms appear in middle-aged and elderly people, they should be considered to be caused by cerebrovascular diseases, such as because of cerebral atherosclerosis, Insufficient blood supply to the brain causes the patient’s brain to be in a state of ischemia and lack of oxygen, which can cause the patient to show symptoms such as sleepiness, vomiting and nausea. By improving the blood supply to the brain, the patient’s symptoms can be relieved. 3. Patients with drowsiness, nausea and vomiting may also be caused by infectious diseases. For example, acute gastroenteritis or upper respiratory tract infection may lead to fever, which may also manifest as drowsiness, nausea, vomiting, body fatigue, dizziness, muscle aches, abdominal pain, diarrhea, etc.