UTIs in humans are more commonly caused by infectious factors, and usually elevated white blood cells can be found during routine urine tests. However, some UTIs are caused by sterile inflammation, such as a recent spicy and irritating diet, staying up late, drinking alcohol, being sedentary, getting cold, and bladder irritation signs can cause inflammation of the urethra. However, when the urine routine is checked, it is possible that the result is normal and the patient needs to treat the UTI by improving lifestyle habits and dietary regimen. Therefore, in the case of UTIs, patients who have normal urine tests should be treated according to sterile inflammation, and the symptoms will usually be reduced by improving lifestyle habits in routine cases. If there is no reduction in symptoms, it is recommended that patients check urethroscopy to clarify whether there are pathological changes in the mucous membrane inside the urethra, and then carry out targeted treatment, which is usually more accurate.