Nerve compression occurs when surrounding tissue presses on a nerve, causing pain, numbness, and weakness in its distribution. Dr. Anand Karnam explains the common compression sites, their characteristic patterns, and treatment.
Key Points
- The most common nerve compression syndromes: carpal tunnel (median nerve at wrist), cubital tunnel (ulnar nerve at elbow), and tarsal tunnel (tibial nerve at ankle).
- Nerve compression causes pain, tingling, numbness, and weakness in the distribution of the compressed nerve.
- NCS (nerve conduction study) confirms diagnosis and quantifies severity — essential before surgery.
- Conservative treatment: splinting, NSAIDs, activity modification, and steroid injection — effective for mild-moderate cases.
- Surgery is indicated for severe NCS changes, progressive weakness, or failed conservative treatment.
3–5%
of adults have carpal tunnel syndrome — most common nerve compression
Source: NCBI
90%
success rate of surgical decompression for carpal tunnel
Source: Cochrane
6 weeks
conservative treatment trial before NCS-confirmed cases are referred for surgery
Source: NHS
"The distribution of symptoms is the diagnostic key in nerve compression. Tingling only in the thumb and first two fingers — median nerve compression at the wrist. Tingling in the little finger and ring finger — ulnar nerve at the elbow. The anatomy never lies."
Nerve compression (entrapment neuropathy) occurs when a peripheral nerve is mechanically compressed at a specific anatomical site — a tunnel, passage, or channel through which the nerve runs. The compression impairs blood flow to the nerve and directly damages the myelin sheath, producing symptoms in the nerve's distribution: tingling, numbness, burning pain, and eventually weakness and muscle wasting if the compression is severe and prolonged. Each nerve has predictable entrapment sites and characteristic symptom patterns that allow clinical diagnosis before electrodiagnostic testing.
Common Compression Sites and Patterns
Median nerve at the wrist (Carpal Tunnel Syndrome): The most common entrapment neuropathy. Tingling and numbness in the thumb, index, middle finger, and half of the ring finger — the median nerve distribution. Worse at night and on waking; relieved by shaking the hand. Weakness and wasting of the thenar eminence (thumb muscles) in advanced cases. Risk factors: repetitive wrist use, hypothyroidism, diabetes, pregnancy, rheumatoid arthritis.
Ulnar nerve at the elbow (Cubital Tunnel Syndrome): Tingling in the little finger and ring finger (ulnar side). Pain and tingling at the elbow (the "funny bone"). Weakness of intrinsic hand muscles with loss of grip and pinch strength; clawing of the ring and little fingers in severe cases. Worsened by leaning on the elbow and by prolonged elbow flexion (holding the phone to the ear).
Common peroneal nerve at the fibular head: Compression from habitually crossing legs or prolonged squatting. Causes foot drop (inability to dorsiflex the foot) and numbness over the lateral leg and dorsum of the foot.
Radial nerve ("Saturday night palsy"): Compression in the spiral groove of the humerus — wrist drop.
Investigation and Treatment
Nerve conduction studies (NCS) confirm the site and severity of compression. Treatment: ergonomic modification; wrist splinting for CTS; steroid injection; surgical decompression (CTS release, ulnar nerve transposition) for severe or non-responding cases. Sri Anand CNC, Chanda Nagar, Hyderabad. Call +91 90633 66983.
Dr. Anand Karnam
DrNB Neurology · Sri Anand CNC, Chanda Nagar Hyderabad · Sri Anand Child and Neuro Center
DrNB-qualified Neurologist, Fellow of the World Headache Society (FWHS), and Headache Specialist with 12+ years of experience treating epilepsy, stroke, migraine, and movement disorders. Practices at Sri Anand Child and Neuro Center, Chanda Nagar, Hyderabad.
References & Sources
- 1.Peripheral Nerve Compression — NCBI StatPearls — NCBI StatPearls
- 2.Peripheral Neuropathy — NHS — NHS UK
- 3.Nerve Disorders — NIH MedlinePlus — NIH MedlinePlus
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