Neurological conditions affecting the vagina

There are a handful of neurological conditions that can either directly or indirectly affect the pelvic organs and the sexual response. Because so much of what happens in the vulva, vagina and bladder relies on healthy nerve signals, damage anywhere along those pathways — in the brain, the spinal cord, or the nerves themselves — can change sensation, arousal, lubrication, orgasm and bladder control.

How your sexual response relies on nerves

Genital arousal is largely run by the parasympathetic nerves that leave the lower (sacral) spinal cord at levels S2–S4 and travel via the pelvic nerve. These bring blood flow to the clitoris and vaginal walls and drive lubrication. They are balanced by sympathetic nerves from higher up (the thoracolumbar cord), while the pudendal nerve — also from S2–S4 — carries sensation from the vulva and is central to the reflexes of orgasm.¹

Because arousal, sensation and orgasm each depend on this network, injury or disease affecting the brain, spinal cord, autonomic nerves or peripheral nerves can profoundly influence both sexual wellbeing and bladder function.²

Neurological conditions that can affect the vulva, vagina and pelvic organs

Multiple sclerosis (MS)

MS damages the protective coating around nerves, which can interrupt the signals to and from the genitals. Reduced or absent genital sensation, vaginal dryness from impaired lubrication, difficulty reaching orgasm and lower libido are all common — and MS also frequently causes a neurogenic bladder with urgency, frequency and leaking.³

Spinal cord injury

Spinal cord injury affects the sexual response differently depending on the level and completeness of the injury. The sacral reflexes that produce lubrication and engorgement can remain even when sensation is lost, while arousal driven by thoughts and images (psychogenic arousal) depends on the pathways between the brain and the lower cord. Bladder control is almost always affected.⁴

Diabetic neuropathy

Long-standing or poorly controlled diabetes can damage both the small blood vessels and the autonomic and sensory nerves that supply the genitals. This can lead to reduced sensation, slower or weaker arousal and lubrication, and bladder problems. It is common, but often goes unasked-about in diabetes care.⁵

Pudendal neuralgia

When the pudendal nerve itself is irritated or compressed, it can cause burning, aching or raw neuropathic pain anywhere in its territory — the clitoris, labia, vagina and perineum — classically worse when sitting. It is diagnosed clinically using the Nantes criteria.⁶

Cauda equina syndrome (a medical emergency)

Cauda equina syndrome is a medical emergency. When the bundle of nerve roots at the base of the spine is compressed, it can cause numbness around the ‘saddle’ area (the parts that would touch a saddle), new bladder or bowel problems, and sexual dysfunction. New saddle numbness or a sudden change in bladder or bowel control needs urgent medical assessment and imaging — do not wait.⁷

Neurogenic bladder

When the nerves controlling the bladder are affected, the bladder can become overactive (urgency, frequency, leaking) or underactive (trouble emptying, with retention). Which pattern you get depends on where along the nerve pathway the problem sits.⁸

Persistent genital arousal disorder (PGAD)

Persistent genital arousal disorder is persistent, unwanted and distressing genital arousal that has nothing to do with sexual desire. It is increasingly understood to have neurological roots, with the trigger able to sit anywhere from the peripheral nerves and sacral nerve roots (including Tarlov cysts) to the spinal cord and brain.⁹

Stroke and Parkinson’s disease

Stroke and Parkinson’s disease can also reduce desire, arousal, lubrication and orgasm, through a mix of direct nerve injury, medication effects, mood and physical limitations.²

When to get help

If you notice new numbness around the vulva, perineum or ‘saddle’ area, or a sudden change in bladder or bowel control, treat it as urgent and seek medical care straight away. For longer-standing changes in sensation, arousal or lubrication linked to a neurological condition, a knowledgeable practitioner can help you work out what is going on and what might help — including pelvic floor support, lubrication strategies and managing the underlying condition.

This article is general information and not a substitute for personalised medical advice. If you notice sudden numbness or new bladder or bowel changes, seek urgent medical care; for ongoing symptoms, please see an experienced practitioner.