Intercostal Neuralgia
Pain along a rib from intercostal nerve irritation or damage
ICD-10: G58.0 · thoracic condition
Intercostal neuralgia is pain in the distribution of one or more intercostal nerves — the nerves that run along the inferior border of each rib from the thoracic spine to the anterior chest and abdominal wall. The pain is typically sharp, burning, or electric in quality, following a band-like dermatomal distribution from back to front. Patients often describe it as wrapping around one side of the chest. The most common cause is herpes zoster (shingles), which inflames the dorsal root ganglion and intercostal nerve, producing the acute pain of shingles and, in about 10–15% of patients over age 60, post-herpetic neuralgia that can persist for months to years after the rash resolves. Thoracic surgery (thoracotomy, video-assisted thoracic surgery) is the second most common cause, as rib spreading and nerve entrapment during chest surgery produces post-thoracotomy pain syndrome. Trauma, rib fractures, thoracic disc herniation, and costotransverse joint inflammation are additional causes. Treatment follows a neuropathic pain algorithm: topical lidocaine patches and capsaicin cream for localized disease, gabapentinoids (gabapentin, pregabalin) and tricyclic antidepressants for systemic neuropathic modulation, and intercostal nerve blocks for acute exacerbations. Spinal cord stimulation provides relief in chronic refractory cases.
Anatomy & Pathology
The intercostal nerves are the ventral rami of thoracic spinal nerves T1–T11 (T12 is the subcostal nerve). Each nerve exits the intervertebral foramen, passes around the chest wall in the subcostal groove on the underside of the rib, and divides into lateral and anterior cutaneous branches supplying the skin and muscles of the chest and upper abdomen. Because the nerves travel in a fixed bony groove, they are vulnerable to compression from above by osteophytes, disc material, or rib periosteum.
Symptoms
- Sharp, burning, or electric pain following a band from spine to sternum or abdomen
- Allodynia — light touch or clothing contact triggers pain
- Pain worsened by deep breathing, coughing, or trunk movement
- Dysesthesias (abnormal sensations) in the affected dermatome
- Vesicular rash in shingles-related cases (may precede pain by 1–2 days)
- Hypersensitivity or numbness in the intercostal strip
- Pain wrapping anteriorly to mimic cardiac or abdominal visceral pain
Causes & Risk Factors
- Herpes zoster (shingles) reactivation in the dorsal root ganglion
- Post-thoracotomy or VATS surgery with intercostal nerve injury or entrapment
- Rib fracture with callus impinging on the intercostal nerve
- Thoracic disc herniation compressing a nerve root
- Costotransverse or costovertebral joint inflammation irritating adjacent nerve
Imaging Findings
Imaging studies are commonly used to identify findings associated with this condition. Results vary by individual; a qualified spine specialist interprets findings in the context of a full clinical evaluation.
MRI
- MRI of the thoracic spine may show disc herniation, nerve root compression, or tumor compressing the intercostal nerve at its origin
- Soft tissue masses (neurofibroma, schwannoma) along the intercostal nerve course visible on fat-suppressed sequences
- Postherpetic neuralgia and ACNES have no MRI correlates — diagnosis is clinical
- Note: Most intercostal neuralgia has normal imaging — the nerve injury is functional or microscopic
CT Scan
- Rib fracture (acute or healing) as a mechanical cause of nerve irritation
- Tumor invasion of the rib or vertebral body (e.g., metastasis) causing intercostal nerve compression
- Chest CT with contrast to exclude pleural, pericardial, or mediastinal pathology mimicking intercostal neuralgia
X-Ray
- Rib fracture or deformity at the painful level
- Chest X-ray to exclude pneumothorax, pleural effusion, or pulmonary pathology
- Normal in ACNES, postherpetic neuralgia, and most idiopathic intercostal neuralgia
Who Is Commonly Affected
The following patterns are commonly associated with this condition based on published population studies. Individual presentation varies; these figures are informational only.
Peak Age Range
Postherpetic neuralgia: over 60 years; post-thoracotomy: any surgical patient; ACNES: any age, common in young women
Gender Distribution
ACNES: female predominance (approximately 3:1); herpes zoster-related: equal
Estimated Prevalence
Herpes zoster affects approximately 1 million Americans annually, with 10–15% developing postherpetic neuralgia; ACNES is underdiagnosed and estimated at 1–2% of abdominal pain patients
Treatment Options
Conservative
- Topical lidocaine 5% patches applied directly over the painful dermatome for up to 12 hours/day
- Gabapentin or pregabalin for neuropathic pain modulation
- Tricyclic antidepressants (nortriptyline, amitriptyline) for central sensitization
Surgical
- Intercostal nerve block with local anesthetic and corticosteroid for diagnostic and therapeutic relief
- Pulsed radiofrequency ablation of the intercostal nerve for refractory neuralgia
- Spinal cord stimulation at thoracic levels for chronic, treatment-refractory intercostal neuralgia
When to see a spine specialist
Seek prompt medical evaluation for chest or abdominal pain in a band-like distribution — cardiac, pulmonary, and gastrointestinal causes must be excluded first. If a vesicular rash appears, antiviral treatment within 72 hours of rash onset significantly reduces the risk of post-herpetic neuralgia. See a pain specialist if intercostal pain persists longer than 3 months.
Specialists Who Treat Intercostal Neuralgia
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Questions to Ask Your Doctor
Bring these questions to your next appointment about intercostal neuralgia.
- 1
Is my chest or rib pain caused by intercostal nerve compression, postherpetic neuralgia, a rib fracture, or anterior cutaneous nerve entrapment (ACNES)?
- 2
Has a Carnett test been performed to differentiate abdominal wall pain (positive Carnett) from intraabdominal causes?
- 3
Would an intercostal nerve block both confirm the diagnosis and provide therapeutic relief?
- 4
Are there medications specifically targeting neuropathic pain (gabapentin, tricyclics, topical lidocaine) that would be appropriate for my case?
- 5
If conservative treatment fails, what are the options — cryoablation, radiofrequency ablation, or surgical decompression for ACNES?
Research Evidence
No studies reviewed yet for this condition. Check back soon — our evidence pipeline runs nightly.
Clinical Evidence
Frequently Asked Questions
What is post-herpetic neuralgia and how long does it last?
Post-herpetic neuralgia (PHN) is persistent neuropathic pain in the distribution of the shingles rash lasting more than 90 days after rash healing. It occurs in approximately 10–15% of shingles patients overall, rising to 30–50% in those over age 70. PHN can last months to years. Early antiviral treatment (acyclovir, valacyclovir) within 72 hours of rash onset, and vaccination with recombinant zoster vaccine (Shingrix), are the most effective preventive measures.
Can intercostal neuralgia be confused with a heart attack?
Yes, and this is a critical diagnostic consideration. Intercostal neuralgia from lower thoracic levels (T5–T9) produces anterior chest pain that can closely mimic angina or myocardial infarction. Key distinguishing features: dermatomal band-like distribution, worsening with breathing or palpation, and provocation by spinal movement rather than exertion. Cardiac evaluation including ECG and cardiac enzymes should always be performed first when chest pain etiology is unclear.
Is there a vaccine to prevent shingles-related intercostal neuralgia?
Yes. Shingrix (recombinant zoster vaccine) is 90–97% effective at preventing shingles and 89% effective at preventing post-herpetic neuralgia in adults over 50. It is recommended for all immunocompetent adults over 50 by the CDC, even those who previously received the older Zostavax vaccine. Two doses are given 2–6 months apart.