In a 56-year-old man with a prior right inguinal hernia and a recent negative groin ultrasound who presents with a one‑month history of right groin burning pain limiting walking, what is the appropriate next step in diagnosis and management?

Inguinal Nerve Entrapment: Diagnosis and Management

This patient most likely has inguinal nerve entrapment, and the next step is a systematic physical examination targeting neurologic and musculoskeletal sources, followed by a 6–12 week trial of supervised physical therapy focused on core strengthening and neuromuscular rehabilitation. 1

Why This Is Nerve Entrapment, Not Recurrent Hernia

The clinical picture strongly suggests inguinal nerve entrapment rather than hernia recurrence:

• Burning pain is the hallmark of neuropathic mechanisms and differentiates nerve entrapment from visceral or musculoskeletal sources 1
• The combination of burning-type groin pain, negative ultrasound, and prior hernia history points directly to nerve entrapment 1
• A negative ultrasound does not exclude nerve pathology—it remains a common cause of persistent post-hernia pain 1
• While MRI has higher sensitivity (94.5%) and specificity (96.3%) than ultrasound for detecting hernias 2, 3, the burning quality of pain makes nerve pathology far more likely than an occult hernia

Essential Physical Examination Components

Before ordering additional imaging, perform these targeted examinations:

• Pelvic floor assessment: Transrectal digital palpation of levator ani and obturator internus to identify tenderness that may refer pain to the groin 1
• Hip examination: Rule out hip joint disease as a source of referred groin pain 1, 4
• Lumbar spine examination: Exclude lumbosacral radiculopathy, which frequently accompanies groin pain 1, 4
• Direct palpation testing: Assess for adductor-related, pubic-related, inguinal-related, and iliopsoas-related pain patterns 4

Critical pitfall: Co-existing lumbosacral radiculopathy and hip pathology frequently accompany groin pain and must be actively sought 1

First-Line Treatment: Physical Therapy

Initiate a supervised, active physical therapy program for 6–12 weeks even when nerve entrapment is suspected 1:

• Focus on core strengthening and neuromuscular rehabilitation to address pelvic-floor dysfunction and abdominal-wall weakness 1, 4
• Targeted exercises improve biomechanics and reduce irritation of entrapped nerves 1
• This approach is recommended by the American Urological Association 2025 guideline as first-line management 1
• For inguinal-related groin pain without hernia, physical therapy is the initial treatment of choice 4

When to Consider Advanced Imaging

If the physical examination suggests concomitant hip pathology or if symptoms persist despite conservative management:

• MRI of the pelvis should be performed when the diagnosis remains unclear after initial evaluation 4
• MRI of the lumbar/sacral spine is indicated if neurologic signs suggest radiculopathy 5
• Dynamic ultrasound can evaluate for posterior abdominal wall weakness if inguinal-related pain predominates 4

Interventional Options for Refractory Cases

If pain persists after 6–12 weeks of physical therapy:

• Nerve blocks (iliohypogastric nerve block) can provide diagnostic and therapeutic benefit 6
• Surgical neurectomy involving all three inguinal nerves should be considered only after at least 1 year from the previous hernia repair and failure of non-surgical pain management 7
• Targeted Robotic-Assisted Intra-Abdominal Denervation (TRAAD) can ablate the genitofemoral nerve above the internal inguinal ring in complex, treatment-resistant cases 1

Key Pitfalls to Avoid

• Do not assume recurrent hernia based solely on history—burning pain is neuropathic, not mechanical 1
• Do not rush to surgery—conservative management with physical therapy should be exhausted first 1, 4
• Do not overlook referred pain—hip and spine pathology commonly coexist with groin pain 1, 4
• Do not rely on imaging alone—nerve entrapment is a clinical diagnosis supported by examination findings 1