If abdominal cramps, watery stools, nausea and vomiting occur in the middle of the night, these symptoms are commonly caused by acute gastroenteritis, which may be an acute abdominal pain attack caused by cold or unclean diet. But for this case to be diagnosed, it is best to go to a regular hospital for an emergency examination, including a review of routine blood and urine tests and the corresponding ultrasound of the abdomen, which can effectively find the specific causes of abdominal pain and nausea and vomiting. After detailed examination in the hospital, the exact cause can be found. If it is caused by simple gastroenteritis, symptomatic treatment such as antispasmodic, analgesic and infusion can be given. If it is caused by other reasons, you should actively cooperate with the doctor to take further treatment measures in order to effectively relieve the pain, nausea, vomiting and other symptoms.