Groin pain is common in athletes, especially in sports involving twisting, sprinting, or kicking. Muscle strains and hip joint injuries are the usual suspects — but another important, less well-known cause is ilioinguinal nerve pain. Compression or irritation of this nerve causes persistent discomfort and reduced performance, often mistaken for other groin problems. How do we diagnose ilioinguinal neuralgia, and what are the treatment options?
Ilioinguinal nerve pain is one of several causes of groin nerve pain.
What is the ilioinguinal nerve?
The ilioinguinal nerve arises from the first lumbar nerve root (L1). It passes through the abdominal wall and innervates the groin, upper inner thigh, and sometimes the scrotum or labia. When it’s injured, irritated, or compressed, athletes develop ilioinguinal neuralgia — a neuropathic pain that’s both frustrating and limiting.
Common causes include recent inguinal or pelvic surgery, recurrent abdominal muscle tears, and blunt abdominal or pelvic trauma.
Symptoms of ilioinguinal neuralgia
Athletes with ilioinguinal nerve pain often report:
- Burning, stabbing, or aching pain in the groin or lower abdomen
- Pain radiating to the upper inner thigh or genital region
- Worse with sprinting, twisting, or kicking
- Numbness, tingling, or hypersensitivity in the groin
- Aggravation by tight clothing, abdominal straining, or hip extension
This is easily confused with a hernia or an adductor injury. Other overlapping causes include genitofemoral nerve pain, meralgia paraesthetica, femoral neuralgia, and lumbar radiculopathy.
Clinical presentation
On examination, doctors may find:
- Localised tenderness along the nerve, especially near the inguinal canal or iliac spine — tapping the nerve may aggravate the pain
- Pain reproduced by abdominal contraction or hip extension
- Normal hip range and strength, helping rule out hip joint pathology
- No swelling or bulge, helping distinguish it from a hernia
The key is recognising the pain as neuropathic rather than purely mechanical.
Investigations
Diagnosis is often clinical, but investigations rule out other causes:
- Ultrasound to exclude an inguinal hernia or show scar tissue compressing the nerve
- MRI pelvis/abdomen to exclude hip joint, muscle, or abdominal wall pathology
- Nerve conduction studies — technically challenging, but may support the diagnosis or exclude a lumbar spine source
- Diagnostic ilioinguinal block — ultrasound-guided local anaesthetic around the nerve gives temporary relief and confirms the diagnosis, targeting the nerve between the transversus abdominis and internal oblique beside the inguinal canal
How do we treat ilioinguinal nerve pain?
Most cases combine conservative and interventional care:
- Activity modification — reduce sprinting, twisting, and kicking until symptoms improve
- Physiotherapy — core stability, hip and pelvic strengthening, and biomechanics correction
- Medication — neuromodulators such as duloxetine or amitriptyline; topical lidocaine patches or capsaicin cream
- Ilioinguinal nerve block — ultrasound-guided local anaesthetic and cortisone can relieve pain and confirm the diagnosis. Results are mixed, with some studies showing benefit.
- Radiofrequency ablation — if the block works, ablation gives longer-lasting relief — around 12 months versus 1.5 months from the block alone
- Surgery (decompression or neurectomy) — reserved for severe, persistent cases unresponsive to injections and ablation.
The ilioinguinal nerve block technique
Performed under ultrasound, with the patient supine. The probe is scanned transversely from the anterior superior iliac spine to locate the nerve between the transversus abdominis and internal oblique. Using an in-plane approach from lateral to medial, the needle tip is placed in the fascial plane between those two muscle layers. A small amount of local anaesthetic separates the layers, then 5–10 ml of low-dose steroid and 5% dextrose is injected into the space.
Frequently asked questions about ilioinguinal nerve pain
What does ilioinguinal nerve pain feel like?
Burning pain that starts at the lower abdominal wall and spreads to the inguinal region — the crease between the lower abdomen and upper thigh. It’s typically aggravated by hip or abdominal movements such as abdominal twists or hip flexor stretches.
How is ilioinguinal nerve pain treated?
We start with neuromodulators such as amitriptyline or duloxetine, then often an ultrasound-guided ilioinguinal nerve block between the abdominal wall muscles. If the block relieves the pain, we consider a longer-lasting radiofrequency ablation.
Can the ilioinguinal nerve heal itself?
Yes. Though relatively uncommon, ilioinguinal nerve pain can resolve on its own and may not need treatment.
How is ilioinguinal nerve pain different from a hernia?
A hernia usually produces a bulge and mechanical pain; ilioinguinal neuralgia has no bulge and presents with neuropathic features—burning, tingling, hypersensitivity. Ultrasound helps exclude a hernia, and a diagnostic nerve block confirms the nerve as the source.
Final word from Sport Doctor London about ilioinguinal nerve pain
Ilioinguinal nerve pain is an under-recognised cause of chronic groin pain in athletes. Because ilioinguinal neuralgia mimics hernia and muscle injuries, it’s often overlooked. Careful assessment, supported by imaging and a diagnostic ilioinguinal block, is key to an accurate diagnosis. With tailored treatment — physiotherapy, injections, and occasionally surgery — most athletes return to sport with excellent outcomes.
To book a one-stop assessment with Dr Masci in London, contact the team here or call +44 (0) 203 488 0350.
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