The common causes of recurrent urinary tract infections in women are as follows: 1. Incomplete treatment of urinary tract infections for the first time. The general course of treatment for simple cystitis requires one week. Acute simple pyelonephritis course of treatment generally requires more than two weeks. It is common for some patients to stop applying drugs when the treatment time is short and the symptoms have just been controlled, or even when the symptoms have not been completely controlled, which is a very important cause of bacterial resistance in patients, leading to easy recurrence of the disease.2. During the treatment period and after the treatment, the patients did not pay attention to proper rest and overwork. Especially in acute pyelonephritis patients, after overwork, the condition is prone to recurrence. 3, patients with complex urinary tract infections. For example, patients with diabetes, immune system diseases, indwelling urinary catheters, the condition is more complex, need to be treated specifically.