Nausea, vomiting and diarrhea are often considered acute gastroenteritis, food poisoning, gastrointestinal dysfunction and other diseases caused by different causes of different treatments, including general treatment, montelukast, norfloxacin, trimethoprim and other medications, surgical treatment and so on. 1. Acute gastroenteritis: mostly caused by unclean diet, if bacterial infection, can take norfloxacin, metronidazole and other antibiotics for anti-infection treatment; if viral infection can take oseltamivir and other antiviral drugs. Nausea, vomiting, diarrhea, severe patients should be fasting, while paying attention to replenish body fluids. 2. Food poisoning: mostly caused by food contaminated by a large number of bacteria or toxic substances, etc. Patients should seek medical treatment as soon as possible and undergo gastric lavage. Patients with severe vomiting and diarrhea should pay attention to replenishing body fluids. If the patient is accompanied by severe abdominal pain, can take scopolamine and other antispasmodic analgesic drugs. 3. Irritable bowel syndrome: patients with intestinal tract relative to normal people more sensitive, prone to nausea, vomiting and diarrhea and other symptoms. Patients can take loperamide, montelukast, 5-hydroxytryptamine and trimethoprim for symptomatic treatment. 4. Intestinal tumors: such as colon cancer and other diseases, can also cause nausea, vomiting and diarrhea symptoms, and then can also consider surgical treatment or radiotherapy. In addition, patients should pay attention to light diet, avoid eating cold and spicy food such as chili peppers and greasy food that is difficult to be digested. Chew slowly, eat small meals and avoid overeating. Patients with nausea, vomiting and diarrhea are advised to consult a doctor in time to identify the cause of the disease and carry out targeted treatment. Drugs must be taken strictly in accordance with the doctor’s instructions, not self-medication.