1. Carpal Tunnel Syndrome Slideshow
2. Take the Carpal Tunnel Syndrome Quiz!
3. View Images of Carpal Tunnel Syndrome

Medical Author:

William C. Shiel Jr., MD, FACP, FACR

William C. Shiel Jr., MD, FACP, FACR

Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

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Medical Editor:

Melissa Conrad Stöppler, MD

Melissa Conrad Stöppler, MD

Melissa Conrad Stöppler, MD, is a U.S. board-certified Anatomic Pathologist with subspecialty training in the fields of Experimental and Molecular Pathology. Dr. Stöppler's educational background includes a BA with Highest Distinction from the University of Virginia and an MD from the University of North Carolina. She completed residency training in Anatomic Pathology at Georgetown University followed by subspecialty fellowship training in molecular diagnostics and experimental pathology.

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In this Article

• What is carpal tunnel syndrome?
• What is tarsal tunnel syndrome?
• What conditions and diseases cause carpal tunnel syndrome?
• What are carpal tunnel syndrome symptoms?
• How is carpal tunnel syndrome diagnosed?
• What is the treatment for carpal tunnel syndrome? Can carpal tunnel syndrome be prevented?
• What are complications of carpal tunnel syndrome?
• What is the prognosis for carpal tunnel syndrome and tarsal tunnel syndrome?
• Carpal tunnel syndrome and tarsal tunnel syndrome facts
• Carpal Tunnel Syndrome - Slideshow
• Take the Carpal Tunnel Syndrome Quiz!
• View Images of Carpal Tunnel Syndrome
• Carpal Tunnel Syndrome FAQs
• Patient Comments: Carpal or Tarsal Tunnel Syndrome - Experience
• Patient Comments: Carpal or Tarsal Tunnel Syndrome - Symptoms and Signs
• Patient Comments: Carpal Tunnel Syndrome - Treatment
• Find a local Rheumatologist in your town
• Carpal Tunnel Syndrome Index

People with carpal tunnel syndrome initially feel numbness and tingling of the hand in the distribution of the median nerve (the thumb, index, middle, and part of the fourth fingers). These sensations are often more pronounced at night and can awaken people from sleep. The reason symptoms are worse at night may be related to the flexed-wrist sleeping position and/or fluid accumulating around the wrist and hand while lying flat. Carpal tunnel syndrome may be a temporary condition that completely resolves or it can persist and progress.

As the disease progresses, patients can develop a burning sensation, and/or cramping and weakness of the hand. Decreased grip strength can lead to frequent dropping of objects from the hand. Occasionally, sharp shooting pains can be felt in the forearm. Chronic carpal tunnel syndrome can also lead to wasting (atrophy) of the hand muscles, particularly those near the base of the thumb in the palm of the hand.

Picture of carpal tunnel syndrome

The diagnosis of carpal tunnel syndrome is suspected based on the symptoms and the distribution of the hand numbness. Examination of the neck, shoulder, elbow, pulses, and reflexes can be performed to exclude other conditions that can mimic carpal tunnel syndrome. The wrist can be examined for swelling, warmth, tenderness, deformity, and discoloration. Sometimes tapping the front of the wrist can reproduce tingling of the hand and is referred to as Tinel's sign of carpal tunnel syndrome. Symptoms can also at times be reproduced by the examiner by bending the wrist forward (referred to as Phalen's maneuver).

The diagnosis is strongly suggested when a nerve conduction velocity test is abnormal. This test involves measuring the rate of speed of electrical impulses as they travel down a nerve. In carpal tunnel syndrome, the impulse slows as it crosses through the carpal tunnel. A test of muscles of the extremity, electromyogram (EMG), is sometimes performed to exclude or detect other conditions that might mimic carpal tunnel syndrome.

Blood tests may be performed to identify medical conditions associated with carpal tunnel syndrome. These tests include thyroid hormone levels, complete blood counts, and blood sugar and protein analysis. X-ray tests of the wrist and hand might also be helpful to identify abnormalities of the bones and joints of the wrist.