Most of the symptoms of pediatric urinary tract infections disappear in a few days after reasonable treatment, but some of the patients may be recurrent or re-infected, but there is no specific statistics on the recurrence rate. Recurrence refers to the original infection of bacteria, not completely killed, the emergence of a suitable environment for the growth of bacteria will grow again, the vast majority of children recurring, mostly within one month after treatment. Pediatric urinary tract infections may recur, mainly due to irregular treatment, lack of attention to personal hygiene, or the child’s physical weakness and other factors. Reinfection may also be the last infection has been cured, this time by a different bacteria caused by urinary tract infection, most common in girls, often within 6 months after the withdrawal of drugs. After the recurrence of urinary tract infection, urine bacterial culture should be carried out, and then choose sensitive antibiotics, according to the course of medication, need to follow the doctor’s advice to take, avoid unauthorized use of drugs.