OHSU specialists can offer you relief for carpal tunnel syndrome, a condition that causes hand pain and numbness. You’ll find:

• A team approach to care, with specialists from areas such as neurology, neurosurgery, plastic/reconstructive surgery and orthopaedics working together.
• Surgeons with advanced training from some of the nation’s top medical centers.
• Rehabilitation specialists who can teach you how to move more comfortably at work and home.

What is carpal tunnel syndrome?

In carpal tunnel syndrome, the median nerve becomes pinched or compressed. The nerve runs through a passage called the carpal tunnel, along the inner arm to the thumb and three middle fingers. Pressure on the median nerve can cause numbness, tingling and pain.

Who gets carpal tunnel syndrome?

Carpal tunnel syndrome is the most common entrapment neuropathy, or pinched nerve. It affects an estimated 3-5% of U.S. adults, most older than 30. It is more common in women because their carpal tunnel — the passage for the median nerve — is smaller.

People who use repetitive hand movements during daily routines are most at risk. Hair stylists, computer programmers or assembly line workers, for example, are more likely to develop it.

What causes carpal tunnel syndrome?

Most of the time, the exact cause of carpal tunnel syndrome is unknown. Studies have found that some repetitive hand motions can increase risk. Deformities or injuries to the small bones in the wrist can also compress the nerve.

Conditions that can cause or worsen carpal tunnel syndrome include:

• High blood sugar and diabetes, which may damage nerve fibers.
• Thyroid disease, which may cause fluid buildup that puts pressure on the median nerve.
• Fluid retention during pregnancy or menopause, which can compress the nerve.

Symptoms

• Numbness in the fingers or palm
• Tingling or a feeling of “pins and needles”
• Burning pain
• Weakness, especially when pinching the thumb and fingers

You may notice worse symptoms at night if you sleep with your wrists flexed or bent, pinching the nerve.

Diagnosing carpal tunnel syndrome

In about 10% of U.S. cases, carpal tunnel syndrome is misdiagnosed. It may be confused with arthritis, for example. At OHSU, we have the experience to give you an accurate diagnosis and to recommend the best treatment.

Tests for carpal tunnel syndrome

If we suspect carpal tunnel syndrome, we’ll start by doing a physical exam and asking you about your medical history. Tests to see if your nerves are working properly include:

Electromyography: Your doctor sends a mild electric current to a needle placed in a muscle. It measures how well the nerve supplies electrical signals that cause the muscle to contract.

Nerve conduction velocity test: This test, also called a nerve conduction study, stimulates the nerve and measures how fast an electrical impulse moves through it.

Learn more about tests for nerve disorders.

Carpal tunnel syndrome treatments

Medication: For mild symptoms, we may prescribe anti-inflammatory medications such as ibuprofen to relieve pain. Corticosteroid injections can also reduce inflammation.

Splinting or bracing: A splint can prevent wrist motion to reduce nerve injury and pain. You may wear it at night or while working for a few weeks if your symptoms are mild to moderate.

Rehabilitation therapy: OHSU hand therapy experts can help you change how you move to reduce strain on the nerve.

Surgery: In severe cases, surgery can release pressure on the nerve. This often provides lasting relief. Depending on your symptoms and anatomy, your doctor may recommend:

• Endoscopic surgery: Your surgeon uses small incisions and tools to check for nerve damage and relieve pressure on the nerve.
• Open surgery: Your surgeon makes an incision in the palm to expose the nerve and relieve pressure. Doctors prefer this method in some cases because it gives the surgeon a clear view of the carpal tunnel. Recovery may take longer, and the palm may be tender for a few weeks.

Learn more

• Carpal Tunnel Syndrome, American Society for Surgery of the Hand
• Carpal Tunnel Syndrome, American Academy of Orthopaedic Surgeons