The causes of urinary incontinence in teenage girls may be due to abnormalities of the urinary tract, urinary tract infections, pelvic floor muscle relaxation, neurological causes and so on. 1. Abnormalities of the urinary tract: Abnormalities of the urinary tract may be congenital or acquired causes. Congenital anomalies, such as ectopic ureteral orifice, bladder exstrophy, etc., may lead to damage to the urinary tract, and this will cause urinary incontinence in women. 2. Urinary tract infections: due to bad habits or decreased resistance and other reasons, leading to bacteria and other pathogenic microorganisms invade the epithelium of the urinary tract leading to inflammatory reactions. Common symptoms include: urinary urgency, urinary pain, urinary frequency, etc. In severe cases, urinary incontinence may occur. 3. Pelvic floor muscle relaxation: when there is pelvic floor muscle relaxation, pelvic floor muscle control ability decreases, in coughing, running and other situations, urinary incontinence may occur. 4. Neurological causes: such as prolonged mental stress, may lead to neurogenic bladder, so that young girls often have the feeling of urination and involuntary outflow. Neurological abnormalities caused by diseases such as spinal cord injury may also cause urinary incontinence. There are many other causes of urinary incontinence in teenage girls, it is recommended to go to the hospital in a timely manner, after clarifying the cause of the disease under the guidance of the doctor’s treatment.