Brain & nervesNerve compressionICD-10 G56.0
Carpal tunnel syndrome
The median nerve is squeezed in the carpal tunnel at the wrist, causing tingling, numbness and pain in the thumb and first fingers, often worse at night.
Condition-specific references are below. Individual claims and this page have not been clinically reviewed. Read about this content.
Causes
- Increased pressure in the carpal tunnel
Risk factors
- Female sex
- Pregnancy
- Diabetes and hypothyroidism
- Rheumatoid arthritis
- Obesity
- Repetitive wrist work and vibrating tools
Symptoms
- Tingling and numbness in the thumb, index, middle and half the ring finger
- Symptoms waking you at night; shaking the hand helps
- Weak grip and dropping things
- Wasting at the base of the thumb in severe cases
Diagnosis — tests and examinations
- Clinical tests (Tinel, Phalen)
- Nerve conduction studies
- Ultrasound
Treatment
Medicines and medical treatment
- Wrist splint at night
- Steroid injection
Operations and procedures
- Carpal tunnel release surgery (open or endoscopic)
Self-care, home remedies and lifestyle
- Avoid prolonged wrist bending
- Take breaks from repetitive tasks
Possible complications
- Permanent numbness and thumb muscle wasting
Prevention
- Ergonomic work set-up
Outlook
Surgery relieves symptoms in over 90%; pregnancy-related cases often resolve after birth.
When to see a doctor
See a doctor for persistent numbness, weakness or thumb muscle wasting.
Sources and further reading
These sources cover this condition. They have not been checked against every statement on this page.
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