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About This Condition

Carpal Tunnel Syndrome

What is carpal tunnel syndrome?

Carpal tunnel syndrome is when the median nerve is squeezed (compressed) as it passes through the carpal tunnel. The carpal tunnel is an opening in your wrist that is formed by the carpal bones on the bottom of the wrist and the transverse carpal ligament across the top of the wrist. The median nerve provides sensory and motor functions to the thumb and 3 middle fingers. If it gets compressed or irritated, you may have symptoms.

What causes carpal tunnel syndrome?

Most cases of carpal tunnel syndrome have no specific cause. But any or all of the following may be part of the cause:

  • Frequent, repetitive, small movements with the hands such as with typing or using a keyboard

  • Frequent, repetitive, grasping movements with the hands such as with sports and certain physical activities

  • Joint or bone disease. For example, arthritis, osteoarthritis, or rheumatoid arthritis.

  • Hormonal or metabolic changes. For example, menopause, pregnancy, or thyroid imbalance.

  • Changes in blood sugar levels. For example, with type 2 diabetes.

  • Other conditions or injuries of the wrist. For example, strain, sprain, dislocation, break, or swelling and inflammation.

  • Family history of carpal tunnel syndrome

Who is at risk for carpal tunnel syndrome?

Women get carpal tunnel syndrome 3 times more often than men. It usually often occurs only in adults.

What are the symptoms of carpal tunnel syndrome?

These are the most common symptoms:

  • Weakness when gripping objects with one or both hands

  • Pain or numbness in one or both hands

  • "Pins and needles" feeling in the fingers

  • Swollen feeling in the fingers

  • Burning or tingling in the fingers, especially the thumb and the index and middle fingers

  • Pain or numbness that is worse at night, interrupting sleep

The symptoms of carpal tunnel syndrome may seem like other health conditions or problems. Always see your healthcare provider for a diagnosis.

How is carpal tunnel syndrome diagnosed?

Your provider will check your health history and give you a physical exam. He or she may advise electrodiagnostic tests on your nerves. These tests are the best way to diagnose carpal tunnel syndrome. Electrodiagnostic tests stimulate the muscles and nerves in your hand to see how well they work.

How is carpal tunnel syndrome treated?

Your healthcare provider will discuss different treatment options with you. Treatment will depend on your symptoms, age, and general health. It will also depend on how severe the condition is.

Treatment may include:

  • Splinting your hand. This helps keep your wrist from moving. It also eases the compression of the nerves inside the tunnel.

  • Anti-inflammatory medicines. These are taken by mouth (oral) or injected into the carpal tunnel space. These ease the swelling.

  • Worksite changes. Changing position of your computer keyboard or making other ergonomic changes can help ease symptoms.

  • Exercise. Stretching and strengthening exercises can help when your symptoms are better. A physical or occupational therapist may watch you do the exercises.

  • Surgery. You may need surgery if the condition doesn’t get better with other treatments or go away on its own. This surgery is called carpal tunnel release. This eases compression on the nerves in the carpal tunnel.

Key points about carpal tunnel syndrome

  • Carpal tunnel syndrome is when the median nerve is squeezed (compressed) as it passes through the carpal tunnel in the wrist.

  • Women get carpal tunnel syndrome 3 times more often than men. It often occurs only in adults.

  • Symptoms include weakness when gripping objects, pain or numbness in hands, and a “pins and needles” feeling in the fingers.

  • To diagnose carpal tunnel syndrome, you may have electrodiagnostic tests. These tests stimulate the muscles and nerves in your hand to see how well they work.

  • Treatment may include splinting your hand, medicines, worksite changes, exercise, or surgery.

Next steps

Tips to help you get the most from a visit to your healthcare provider:

  • Know the reason for your visit and what you want to happen.

  • Before your visit, write down questions you want answered.

  • Bring someone with you to help you ask questions and remember what your provider tells you.

  • At the visit, write down the name of a new diagnosis, and any new medicines, treatments, or tests. Also write down any new instructions your provider gives you.

  • Know why a new medicine or treatment is prescribed, and how it will help you. Also know what the side effects are.

  • Ask if your condition can be treated in other ways.

  • Know why a test or procedure is recommended and what the results could mean.

  • Know what to expect if you do not take the medicine or have the test or procedure.

  • If you have a follow-up appointment, write down the date, time, and purpose for that visit.

  • Know how you can contact your provider if you have questions.