Neurogenic Bladder is a medical condition characterized by the inability to control the bladder properly due to damage to the nerves that control urination, leading to overactive or underactive bladder. People suffering from overactive neurogenic bladder are able to urinate, but they have difficulty emptying the bladder completely. They may also experience symptoms, such as frequent strong urge to urinate but passing out only small amount of urine and urine leakage. As they tend to retain only small amount of urine, it increases their risk of urinary tract infections. However, people suffering from underactive neurogenic bladder are able to hold large amount of urine but are unable to determine if the bladder is full or not. They may also have difficulty controlling the muscles of the bladder properly. As such, they will experience frequent urinary leakage when the bladder is filled beyond its limit. This condition is common in people suffering from neurogenic disorders, such as Alzheimer's disease, Parkinson disease, multiple sclerosis and spinal cord injuries. Treatment usually includes catheterization, which involves inserting a thin tube into the bladder to facilitate bladder emptying. If not treated appropriately, neurogenic bladder can lead to kidney failure due to the pressure that built up as a result of overexpansion of the bladder and urinary tract infections.