Tummy aches and diarrhea caused by cold can be relieved by applying hot compresses to the abdomen. You can also drink some hot water, which can usually ease the tummy ache and diarrhea. If the diarrhea is more serious, you can also take some anti-diarrheal medication such as montelukast after consulting your doctor. However, if it is not relieved for a long time, or even worsening, you need to seek medical advice for a clear diagnosis, which may be caused by food poisoning or acute enteritis, not simply due to cold: 1. Food poisoning: If the symptoms of stomach pain and diarrhea are accompanied by nausea and vomiting, you need to be alert to the possibility of food poisoning. In addition to the symptoms of diarrhea, nausea and vomiting, you should be alert to the possibility of food poisoning. If the diagnosis is confirmed, the treatment is usually belladonna tablets for tummy ache and compound phenylephrine for diarrhea if the stool is sterile. In addition, gastric lavage, anti-infection or antiviral treatment is needed for the cause; 2. Acute enteritis: is a common disease of the digestive tract, often manifested as stomach pain, diarrhea, as well as bloating, vomiting, etc., stomach pain is mostly located in the umbilicus. Generally need to see a doctor for bacterial examination, and then select antibacterial drugs, such as norfloxacin. For stomach pain, antispasmodic drugs such as atropine are available, and antidiarrheal drugs such as montelukast, flavopiridol or compound phenelzine are available. In daily life, we should also pay more attention to keep the stomach warm, do not eat too cold food, pay attention to dietary hygiene, etc., so as to avoid the recurrence of such symptoms.