Colds can cause vomiting and diarrhea. There are several common reasons for this: first, patients with colds can cause digestive disorders, resulting in vomiting and diarrhea. Secondly, vomiting and diarrhea are caused by a combination of unclean food and cold. Third, there is a cold called gastrointestinal cold, characterized by fever, vomiting, diarrhea as the main symptoms of the cold. Therefore, colds can cause the above symptoms of vomiting and diarrhea. When symptoms of vomiting and diarrhea appear, active anti-viral, symptomatic treatment such as anti-diarrheal drugs, montelukast, simethicone, etc..