Never had a baby standing suddenly urine flow consider urinary incontinence, may be stress incontinence, overactive bladder disease, urethral stenosis and other diseases lead. 1. Stress incontinence:The etiology of stress incontinence is complex, mainly due to age, gynecological surgery and other factors. The main symptoms are urinary incontinence when getting up and moving, and urinary incontinence when laughing or coughing. 2. Overactive bladder syndrome: The cause of overactive bladder syndrome is still unclear, and it is considered to be related to the urethra muscle, urinary center and other factors. The main symptoms of patients are urinary urgency, urinary frequency, urge incontinence, etc. Overactive bladder may also lead to symptoms such as pubic bone or perineal pain. 3. Urethral stenosis:Urethral stenosis is mostly caused by trauma, the patient will have difficulty urinating, which in turn causes urinary retention, when the bladder is overfilled, there may also be a sudden flow of urine while standing. Patients who have not had a child standing suddenly urine flow, the reasons are very many, may also be cystitis, bladder stones, bladder tuberculosis, etc., should promptly consult a doctor, follow the doctor’s instructions for treatment.