Nausea and vomiting after staying up late can be caused by a variety of reasons, the most common is caused by brain hypoxia, stay up late when the brain’s oxygen demand and oxygen consumption increases, easy to cause brain hypoxia, can lead to brain dysfunction, plant nerve dysfunction, nausea, vomiting performance, generally do not need special treatment, timely supplement sleep, strengthen the diet structure, such as supplemental vitamins, protein, etc. can be restored. In addition, after staying up late there may be damage to the gastrointestinal tract, liver, cardiovascular damage, there will also be nausea, vomiting performance: 1, damage to the gastrointestinal tract: staying up late can lead to some damage to the gastrointestinal tract, such as indigestion, gastritis, serious cases will also appear gastrointestinal ulcers, nausea, want to vomit. If the symptoms are more serious, you can take some drugs to promote gastrointestinal dynamics and drugs to protect the gastric mucosa under the guidance of a doctor; 2, damage to the liver: the liver may be damaged by insufficient blood supply for those who stay up late, and vomiting may also occur, and in severe cases there is abdominal distension, general weakness. Poor appetite and other symptoms, liver function should be checked in time to clarify the degree of liver damage, symptomatic treatment; 3, heart disease: staying up late may also lead to sudden arrhythmias, patients may have chest pain, shortness of breath, nausea and vomiting, etc., timely cardiac ultrasound can detect the condition. Note reasonable arrangement of work and rest time is very important, but if you must stay up late, you can pay attention to often do deep breathing to prevent lack of oxygen to the brain, timely supplementation of nutrition such as vitamins, protein, etc.. Tea and coffee can be refreshing, but the concentration should not be too high, otherwise it hurts the stomach, and should not drink on an empty stomach, after work as soon as possible to supplement sleep.