Leukocytes (++) indicate the presence of urinary tract infection. Leukocytes are inflammatory cells, and when they increase, it means that there is inflammation in the body, which also needs to be combined with the patient’s clinical symptoms for a comprehensive analysis. If the patient is also combined with bladder irritation symptoms or pain and discomfort in the lower back and abdomen, pain and discomfort in the lower abdomen, the diagnosis of urinary tract infection can be confirmed, and can be combined with ultrasound examination to determine whether the patient has urinary stones. Simple urinary tract infections are generally easier to treat, and it is recommended that quinolones be taken to improve the clinical symptoms of patients, such as levofloxacin, ofloxacin, ciprofloxacin and other drugs.