After prolongation surgery and other surgeries, if there are symptoms of urinary tract infection such as urinary urgency and urinary pain, antibiotics such as norfloxacin can be taken to treat the infection, but it is necessary to pay attention to the adverse reactions and contraindications, and use the drugs under the guidance of a professional doctor. After prolongation surgery and other surgeries, if the local skin exists edema, redness and heat and other inflammatory manifestations, in order to prevent infection, you can use iodophor and other topical disinfectants, there is no need to use norfloxacin; if there is urgency of urination, frequency of urination, urinary pain, fever and other infectious manifestations, you can use norfloxacin to carry on the anti-infective treatment. During the use of the drug, if more serious adverse reactions such as nausea, diarrhea, rash, dyspnea, etc. occur, it is recommended to stop using the drug; if the symptoms are not relieved after use, it is recommended to change the anti-infective drug according to the results of drug sensitivity test. Allergy to quinolone antibiotics, people under 18 years old are prohibited to use this drug. This product should be taken on an empty stomach, and avoid sunlight during the medication. After prolonged surgery and other surgeries with manifestations of infection at incisions and other places, it is recommended to go to the hospital in time; Norfloxacin and other antibiotics are recommended to be used under the guidance of clinicians.