Usually antibiotics can be used for bacterial infections or inflammation of the body, prophylactic medication after surgery, etc. However, for viral infections or autoimmune diseases, the use of antibiotics is not only unhelpful but may also be harmful to the body. Antibiotics are prescription drugs, so avoid using them blindly on your own. It needs to be done under the guidance of a doctor, because a disease may have multiple causes, and the doctor needs to consider whether the patient is suffering from a bacterial infection based on various test results such as the patient’s age, symptoms, physical examination and blood tests, and then decide whether to use antibiotics for treatment. And when using antibiotic medicine also according to the principles of antibiotic use: 1, to determine whether it is a bacterial infection, to have a clear indication of bacterial infection; 2, when the pathogenic bacteria is unknown, should first take a broad-spectrum strong antibiotics, as far as possible to cover the possible pathogens. When the diagnosis is clear, then switch to targeted narrow-spectrum antibacterial drugs according to the drug sensitivity test to reduce the generation of drug-resistant bacteria; 3. Try to shorten the course of antibiotic administration.