Patients who have a routine urine test and find nitrites in their urine should still be taken seriously. This is because a positive urine test for nitrite means that the patient has a serious urinary tract infection. Nitrite is an important indicator of infection and should be treated actively with sensitive antibiotics, and the urine routine should be rechecked after treatment, and only when the nitrite turns negative does it mean that the treatment is effective. Especially for patients with urinary stones, if surgery is required, antibiotic treatment is often needed before surgery. It is safer to perform surgery only when the nitrites are negative, otherwise direct surgery may lead to more serious infections.