Diarrhea generally refers to diarrhea, hygromycin is effective in treating diarrhea caused by sensitive bacteria, but not in treating diarrhea caused by viral infections and other causes. Echomycin belongs to a tetracycline antibiotic. It can be used for diseases caused by infections of Rickettsia spp, Mycoplasma spp, Chlamydia spp, Helicobacter spp, Bacillus anthracis, Actinobacillus spp, Clostridium difficile, Vibrio spp, Nucella spp, Campylobacter spp, Yersinia spp, Brucella spp and so on. Clinical resistance to hygromycin is serious. Therefore, if the diarrhea belongs to the above sensitive pathogens caused by infection, only consider the choice of hygromycin treatment. There are many causes of diarrhea, such as viral infections, gastrointestinal disorders, food allergies and so on. In the case of the above causes, oxytetracycline does not have a therapeutic effect. Adverse effects of oxytetracycline may include epigastric discomfort, nausea, vomiting, abdominal distension, and diarrhea. Tetracycline allergic history of people prohibited this product. It should be used reasonably under the guidance of a doctor.