Quick Answer
Numbness in thumb and first two fingers that wakes you at night — classic carpal tunnel.
Medically reviewed by Dr. Jitendra Prasad Yadav • NMC 8029 • Kathmandu Neurology Clinic & Cognitive Center
Carpal tunnel syndrome (CTS) is the most common nerve compression disorder. It occurs when the median nerve —— running from forearm through the wrist into the hand —— is compressed within the carpal tunnel, a narrow passageway of bones and ligaments at the wrist.
CTS causes numbness, tingling, and pain in the thumb, index finger, middle finger, and half of the ring finger. It is especially common in Nepal due to repetitive hand activities in agriculture, construction, and domestic work.
What CTS feels like
- Numbness and tingling in thumb, index, middle, and radial half of ring finger (little finger usually spared).
- Worse at night: symptoms often wake patients; shaking or hanging the hand provides temporary relief.
- Worse with activities: typing, gripping, holding a phone, driving.
- Pain: aching in wrist and forearm, sometimes radiating up the arm.
- Weakness: dropping objects, difficulty with buttons, grip weakness in advanced cases.
- Thenar atrophy: wasting at the base of the thumb in severe, long-standing cases.
Causes and risk factors
Repetitive strain
Most common cause in Nepal: farming, construction, sewing, cooking, typing, and activities requiring sustained wrist flexion or gripping.
Systemic conditions
- Diabetes, hypothyroidism, pregnancy, rheumatoid arthritis, obesity.
Other factors
- Anatomy (smaller tunnel, wrist fractures, ganglion cysts); genetics; age and sex.
Diagnosis
- History: characteristic symptoms, distribution, triggers, nighttime worsening.
- Examination: Tinel's sign (tapping produces tingling), Phalen's maneuver (wrist flexion reproduces symptoms), two-point discrimination, thenar strength.
- Nerve conduction studies (NCS): definitive test measuring median nerve conduction velocity.
- Ultrasound: measures nerve cross-sectional area.
- MRI: rarely needed for atypical cases.
Treatment
Conservative management
- Wrist splinting: neutral-position splint at night; often first-line.
- Activity modification and ergonomic adjustments.
- NSAIDs for pain and inflammation.
- Corticosteroid injection: diagnostic and therapeutic.
- Treating underlying conditions: diabetes, thyroid, pregnancy-related CTS.
Surgical treatment
Carpal tunnel release is indicated when conservative treatment fails after 3-6 months, symptoms are severe or progressive, thenar atrophy is present, or NCS shows severe compression. It involves cutting the transverse carpal ligament; brief outpatient procedure with high success rates.
Preventing CTS
- Ergonomic adjustments (neutral wrist position); regular breaks every 30-45 minutes; wrist strengthening exercises; managing systemic conditions; early treatment before thenar atrophy.
When to seek evaluation
- Numbness or tingling in thumb, index, or middle fingers.
- Symptoms worse at night or with specific activities.
- Hand weakness or dropping objects.
- Symptoms persisting more than a few weeks.
- CTS in both hands (suggests systemic cause).
Carpal tunnel syndrome is highly treatable when diagnosed early. If you have numbness, tingling, or weakness in your hand, neurological evaluation with NCS can confirm the diagnosis and guide treatment.
This article is educational and does not replace individual medical advice.
Frequently asked questions
Answers reviewed by Dr. Jitendra Prasad Yadav • MBBS, MD (Internal Medicine), FICN (Neurology), FCNV, FIHM • NMC 8029
Supplements only help when a deficiency is present; underlying cause-directed care is needed.
If the underlying cause is corrected early (e.g., improving glucose control, treating vitamin deficiency), improvement may occur. Long-standing neuropathy is often not fully reversible.
Migraine is a neurological condition; headache is one feature. Associated symptoms and functional impact are important for diagnosis.
Aura refers to visual, sensory, or speech symptoms that precede the headache in some people. Both types are migraine; the presence of aura may influence management discussion.
More: All FAQs → · Ask Dr. Jitendra →
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References & Review
Reviewed by Dr. Jitendra Prasad Yadav • Last reviewed: 2026-11-10
- International Classification of Headache Disorders, 3rd edition (ICHD-3).
- Harrison's Principles of Internal Medicine — Neurology sections.
- American Academy of Neurology guidelines for selected conditions (where applicable).
Content is educational and aligns with standard medical references; individual evaluation may vary. External links provide context and do not imply endorsement.