Which of the following is a common cause of neurogenic bladder?

• A. Nerve lesion at S2-4, SCI, chronic alcoholism, heavy metal poisoning, diabetes, hypothyroidism, lupus
• B. Urinary tract infection
• C. Overhydration
• D. Vitamin deficiency

Answer: (A)

Neurogenic bladder occurs when the nerves that control the bladder and its sphincter are damaged, so the normal coordination of storage and emptying is lost. Because the bladder’s function depends on intact neural pathways—from sacral nerves (S2–S4) that directly innervate the detrusor muscle to higher brain centers that regulate micturition—any disruption along these pathways can produce neurogenic bladder.

The most common causative factors include direct nerve lesions at the sacral level, spinal cord injury, and conditions that affect nerves more broadly, such as chronic alcoholism, heavy metal poisoning, diabetes with autonomic neuropathy, hypothyroidism, and autoimmune diseases like lupus. Each of these can impair the autonomic or somatic nerves controlling the bladder, leading to improper storage or voiding.

Urinary tract infection is a consequence that can accompany bladder dysfunction but does not by itself cause neurogenic bladder. Overhydration and vitamin deficiencies do not typically disrupt the neural control of the bladder in the way these other conditions do.

So the listed factors reflect disruptions to the neural control systems of the bladder, making them common etiologies for neurogenic bladder.