Frequent vomiting and diarrhea, stomach pain, may be due to acute gastroenteritis, food poisoning, chronic pancreatitis and other reasons. 1. Acute gastroenteritis: it may be caused by improper diet, pathogenic microorganisms infection, drinking alcohol, etc. Patients will mostly have nausea, vomiting, abdominal pain, diarrhea, fever and other symptoms, and in severe cases, vomiting and diarrhea symptoms. 2. Food poisoning: Eating food contaminated by biological and chemical substances may cause Vibrio parahaemolyticus food poisoning. As the incubation period of the virus is relatively short, patients will have nausea, vomiting, diarrhea, abdominal pain and other symptoms immediately. 3. Chronic pancreatitis: In addition to abdominal pain, chronic pancreatitis may also cause nausea, vomiting and other symptoms, leading to a decline in digestive function, intake of food can not be digested and absorbed by the intestinal tract, so there will also be vomiting, diarrhea, stomach pain symptoms. 4. Chronic enteritis: acute attacks of Crohn’s disease and ulcerative colitis can also cause vomiting, diarrhea and stomach pain. The causes of frequent vomiting, diarrhea, stomach pain are more reasons, it is recommended to go to the hospital in a timely manner to improve the examination, to clarify the cause of the disease, and for the cause of the treatment.