Urine involuntarily escapes at any time, there are no more than two possibilities, one of them has an abnormal channel – fistula and deformity, and the second although urine from the normal urethral orifice, but can not be automatically controlled, the symptoms are the same as the fistula, so the urinary fistula should be differentiated from various causes of urinary incontinence, mainly based on the fact that, in the former case, urine is leaked from the fistula hole through the vagina, and the latter case The main basis is that the former urine from the fistula hole through the vagina and leakage, the latter uncontrolled outflow of urine from the urethra. 1, pressure incontinence pressure incontinence of the main lesion may lie in the urethral orifice, urethral sphincter or pelvic floor muscle relaxation, urethra is too short or bladder urethra angle disappears, so when the abdominal pressure increases, the pressure in the bladder is higher than that caused by the urethral pressure (in normal women, when the abdominal pressure increases, the pressure can be passed to the bladder and urethra near 2/3 end), pressure incontinence, often occurring after childbirth, the pressure incontinence, the pressure incontinence, the pressure incontinence, and the pressure incontinence, the pressure incontinence, the pressure incontinence, the pressure incontinence of the urethra. After surgery, old age (lack of sex hormones, tissue relaxation caused by), each aggravated by exertion, clinically manifested as when the patient coughs, sneezes, laughs or stands, urine outflow immediately, even lying down in severe cases, there is also urine overflow, generally only seen in women with a history of vaginal delivery, but a huge vesico-urethro-vaginal fistula repair is also often inherited from the disease after the examination of fistulae, but the patient was asked to cough, that is, see the urine from the Urethral overflow, at this time, such as with the index, the middle two fingers into the vagina, were placed on both sides of the urethra (note that the urethra can not be compressed), and force the urethral tissues to the pubic bone direction, to restore the bladder and urethra and urethra between the normal angle of the urethra and the urethra resistance, and then asked the patient to cough, such as urine no longer overflowing, not only can be diagnosed with stress urinary incontinence, but also suggests that there is a surgical cure may be examined carefully to find fistulae, and then the patient will be asked to cough. The examination must carefully find the fistula, if necessary, to do the blue test to identify, to avoid the small urinary fistula mistaken for stress urinary incontinence. 2, bladder contracture due to tuberculosis lesions make the bladder fibrosis hard and inelastic, capacity is very small, urinate more often, the bladder neck is also due to contracture and loss of contraction, so that the urine can not be controlled and constantly overflow, the symptom is similar to urinary incontinence, but also due to tuberculosis lesions of the neck of the bladder invasion of sphincter caused by loss of urinary function, such patients have typical bladder irritation of tuberculosis, hematuria and tuberculosis toxicity symptoms. The diagnosis can be further confirmed by cystoscopy, urography and urine culture, and sometimes tuberculous contracted bladder can be combined with urinary fistula. 3.Neurogenic bladder dysfunction is a urinary dysfunction caused by the damage of central or peripheral nerves regulating the bladder function. It is mostly seen in spinal cord diseases, such as inflammation, tumors and occult spina bifida; it is occasionally seen in the nerve damage of bladder after extensive radical surgery of cervical cancer; it is also seen in the paralysis of the bladder after the head of the fetus stagnant pressure during delivery, and it is clinically manifested in the lack of contraction of urethra muscle which causes the urinary retention, and part of urine passes through the urethral orifice after the bladder overfilled. When the bladder is overfilled, part of the urine is involuntarily spilled through the urethra. Urinary dysfunction is mainly manifested as urinary retention and overflow incontinence, there is no fistula in the examination, the urine is overflowed from the urethral orifice, and a large amount of urine can be exported from the bladder, which can be identified according to the history of the disease, the clinical manifestations of other primary diseases, and the relevant neurological examination. 4, forced urinary muscle incoordination incontinence due to involuntary paroxysmal contraction of the forced urinary muscle, such involuntary contraction can also be triggered by a sudden increase in intra-abdominal pressure, its performance is similar to stress incontinence, but the patient does not have organic pathology, the urine outflow is not immediately in the pressure increase, but in a few seconds before the start, and when the pressure is lifted can still continue to urinate for 10-20s, in addition to incontinence, such patients still have normal urination. In addition to urinary incontinence, such patients still have normal urinary function. 5.Pseudo incontinence Due to inflammation caused by severe urinary frequency, urinary urgency, and even can not control urination, usually obvious symptoms of infection, with a history of recurrent episodes, anti-infective treatment is effective.