Generally speaking, antibiotics will become resistant after 10 days of use, and if the symptoms of the disease do not improve after 10 days of use, it is recommended to improve the drug sensitivity test in time and adjust the drug program. If the bacterial infection is more serious when using antibiotics may be 10 ~ 30 days on the emergence of drug resistance, if the symptoms of the disease did not improve, it is recommended to improve the pathogenicity of the examination, drug sensitivity test, etc., according to the results of the examination to change to a sensitive drug, to avoid the emergence of drug resistance. However, if the patient’s condition is relatively mild, the course of medication is short, and it is not easy to develop drug resistance. In addition, if you take antibiotics for a long time may lead to dysbiosis, so antibiotics are best selected after the drug sensitivity test, but also should be under the guidance of a professional physician to use the drug, do not blindly use the drug yourself, to avoid taking the drug improperly to avoid the emergence of drug resistance or adverse reactions. It is recommended to avoid spicy and stimulating food during the medication period, and choose light and easy-to-digest food in your diet.