Pudendal Nerve Injury
Damage to the nerve supplying the pelvic floor and genital area
Quick Facts
- Type: Peripheral nerve (neurological) condition
- Common causes: Childbirth, prolonged cycling, surgery, trauma
- Main symptoms: Pelvic pain, numbness, bladder or bowel changes
- Hallmark: Pain worse with sitting, eased by standing
Overview
The pudendal nerve runs from the lower spine through the pelvis to supply the area between the genitals and the anus, including the pelvic floor muscles, the external genitals, and parts of the bladder and bowel control system. A pudendal nerve injury occurs when this nerve is compressed, stretched, or damaged, which can interfere with sensation, comfort, and control in the pelvic region.
A particular form, sometimes called pudendal neuralgia or pudendal nerve entrapment, causes ongoing pain in the area the nerve serves. The condition can be distressing and is sometimes misdiagnosed, but a careful evaluation can identify it and a range of treatments can help reduce symptoms and improve quality of life.
Symptoms
Symptoms are felt in the area supplied by the nerve and often have a characteristic pattern.
- Pain in the genitals, perineum (between the genitals and anus), or around the anus
- Burning, aching, or shooting pain that is often worse when sitting and relieved by standing or lying down
- Numbness or a feeling of swelling or a foreign object in the pelvic area
- Increased sensitivity, so that even light touch or clothing feels painful
- Difficulty with urination or bowel movements, or a feeling of incomplete emptying
- Sexual discomfort or changes in sensation
Symptoms may build gradually and can affect one or both sides. They often interfere with sitting, work, and daily activities.
Causes
The pudendal nerve can be injured when it is stretched, compressed, or directly damaged. Common contributors include:
- Childbirth: Stretching or pressure during a long or difficult vaginal delivery.
- Prolonged sitting or cycling: Repeated pressure on the area, as in long-distance cycling.
- Surgery: Pelvic, gynecological, or colorectal operations near the nerve's path.
- Trauma: Falls onto the buttocks, pelvic fractures, or other injuries.
- Compression by surrounding tissue: Tight ligaments or muscles trapping the nerve, sometimes called entrapment.
In some people, no single clear cause is found, and the condition is thought to result from a combination of factors irritating the nerve.
Risk Factors
- Difficult or assisted childbirth
- Long-distance or frequent cycling
- Jobs or habits involving prolonged sitting
- Previous pelvic surgery or pelvic fracture
- Chronic constipation and repeated straining
- Pelvic floor muscle problems
Diagnosis
Pudendal nerve injury is diagnosed mainly from the history and examination, as there is no single definitive test. A doctor will ask about the pattern of pain, especially whether it worsens with sitting, and examine the pelvic area and nerve function.
- Clinical examination: Testing sensation and tenderness along the nerve's path.
- Nerve block: A diagnostic injection of local anesthetic near the nerve that temporarily relieves pain can support the diagnosis.
- Imaging and nerve studies: MRI or specialized tests to look for compression and rule out other causes.
Other conditions that cause pelvic pain are excluded as part of the assessment.
Treatment
Treatment usually starts with conservative measures and is tailored to the cause and severity. Many people improve with a combination of approaches.
- Activity changes: Avoiding prolonged sitting and pressure, using a cushion that takes weight off the painful area, and reducing cycling.
- Physical therapy: Specialized pelvic floor therapy to relax tight muscles and reduce nerve irritation.
- Medications: Drugs used for nerve pain to calm overactive nerve signals.
- Nerve blocks: Injections that can relieve pain and reduce inflammation.
- Surgery: In selected cases of clear entrapment, an operation to release the nerve may be considered.
Because nerve pain can be persistent, treatment often combines several methods and may take time to work.
Prevention
- Take breaks from prolonged sitting and use a supportive or pressure-relieving cushion
- Use a well-fitted saddle and limit very long cycling sessions
- Treat and avoid chronic constipation to reduce straining
- Address pelvic floor problems early with guided exercises
- Follow recovery advice carefully after pelvic surgery or childbirth
When to See a Doctor
See a doctor if you have ongoing pelvic, genital, or perineal pain, numbness, or pain that is clearly worse when sitting. Seek urgent care if you develop:
- Sudden loss of bladder or bowel control
- Numbness in the groin or saddle area along with leg weakness
- Severe pain after a fall or pelvic injury
These can indicate serious nerve or spinal problems that need prompt evaluation.
Frequently Asked Questions
Why does pudendal nerve pain get worse when sitting?
Sitting puts pressure on the area where the pudendal nerve runs, which irritates an already sensitive nerve. Many people find the pain eases when they stand or lie down. Using a cushion that relieves pressure and limiting sitting time can help.
Can pudendal nerve injury be cured?
Many people improve significantly with conservative treatments such as activity changes, pelvic floor physical therapy, medication, and nerve blocks. Some cases resolve over time, while others need ongoing management. Surgery is reserved for clear cases of nerve entrapment.
Is cycling a cause of pudendal nerve problems?
Frequent or long-distance cycling can put repeated pressure on the pudendal nerve and contribute to injury, especially with a poorly fitted saddle. Adjusting the saddle, taking breaks, and reducing time in the saddle can lower the risk.
How is pudendal nerve injury diagnosed?
There is no single definitive test, so doctors rely on the history and examination, especially the pattern of sitting-related pain. A diagnostic nerve block that temporarily relieves pain can support the diagnosis, and imaging helps rule out other causes.
When should pelvic pain be treated as an emergency?
Sudden loss of bladder or bowel control, numbness in the groin or saddle area with leg weakness, or severe pain after a fall or pelvic injury need urgent medical attention, as they can signal serious nerve or spinal damage.
References
- National Institute of Neurological Disorders and Stroke (NINDS). Peripheral Neuropathy.
- MedlinePlus, U.S. National Library of Medicine. Pelvic pain.
- Royal College of Obstetricians and Gynaecologists (RCOG). Pelvic floor and nerve conditions.
- Mayo Clinic. Pelvic pain — Causes.