Levofloxacin infusion for 5 days or pain after urination may be caused by a variety of factors such as improper use of medication, incorrect medication, and more serious conditions. 1. Improper use of medication: When patients use levofloxacin infusion, the dosage is too small, which may lead to poor drug effects and the phenomenon of pain after urination after 5 days of infusion. 2. Inappropriate medication: If the patient’s disease is not caused by bacteria such as gram-positive bacteria, it may lead to inappropriate medication, which may lead to the phenomenon of pain after urination even after 5 days of infusion. 3. More serious conditions: If the patient’s condition is more serious, it may lead to unsatisfactory drug effects, resulting in the phenomenon of pain after urination even after 5 days of infusion. The patient appeared levofloxacin infusion 5 days or pain after urination, may also be related to other reasons, it is recommended to go to the hospital in time for examination, and under the guidance of the doctor to clarify the cause of the disease, to take the cause of the treatment.