After giving birth to a child, frequent urination, it is recommended to go to the hospital for relevant examinations, can clarify the cause of frequent urination. 1, first of all, we should carry out relevant examinations to rule out the existence of urinary tract infection. If there is a urinary tract infection, it may lead to urinary frequency or urinary urgency, urinary pain and other symptoms, sometimes only manifested as simple urinary frequency, it is recommended to retain urine to do urine routine and mid-range urine culture examination. If the infection is diagnosed, the first anti-infection treatment will be carried out, and then observe whether there is any improvement in the frequency of urination.2. When the pelvic floor muscle relaxation may occur after pregnancy and after giving birth to a child, resulting in the downward shift of the bladder and urethra, which may result in the bladder forcing muscle contraction is relatively weak, or incomplete emptying of the bladder, residual urine is too much. The pelvic floor muscles are particularly affected in patients who have had a normal transvaginal delivery. It is recommended to perform tests related to pelvic floor function and residual urine measurement to see if bladder emptying is normal. Further urodynamic investigations are needed to determine whether the contractile force of the bladder forcing muscles is normal. If pelvic floor muscle relaxation is present, there may be a downward shift of the vesicourethra leading to urinary frequency and incomplete bladder emptying. Postpartum pelvic floor muscle function exercises are needed to see if the frequency of urination improves.