Carpal Tunnel Syndrome

What Is Carpal Tunnel Syndrome?

Carpal tunnel syndrome occurs when the median nerve, one of the main nerves in your arm, gets compressed as it passes through a narrow tunnel at your wrist. This tunnel, called the carpal tunnel, is formed by your wrist bones and a strong ligament. The median nerve shares this tight space with nine tendons that control your fingers.

The median nerve provides feeling to your thumb, index finger, middle finger, and half of your ring finger. It also powers the small muscles at the base of your thumb that let you grip and pinch. When pressure builds up inside the tunnel, the nerve can't function properly, leading to the numbness, tingling, and weakness that define carpal tunnel syndrome.

Symptoms

The hallmark symptom is numbness or tingling in the thumb, index, middle, and ring fingers. Many people notice this most at night, often waking up with their hand feeling asleep or needing to shake it out to get relief. You might feel like your fingers are swollen even when they look normal, or notice a fuzzy, uncomfortable sensation in your hand.

As carpal tunnel syndrome progresses, you may start dropping things, have trouble with fine motor tasks like buttoning a shirt, or notice weakness in your grip and pinch. Some people experience discomfort that radiates up into the forearm or even the shoulder. If the condition has been present for a long time without treatment, the muscles at the base of the thumb can shrink, making it harder to perform everyday tasks.

Causes & Risk Factors

Carpal tunnel syndrome develops when pressure inside the tunnel increases. This usually happens because the tissues lining the tunnel become swollen or inflamed, leaving less room for the nerve. In most cases, there isn't one clear cause, but rather a combination of factors.

Certain conditions increase your risk. These include rheumatoid arthritis, diabetes, thyroid disorders, and pregnancy. Women are more likely to develop carpal tunnel syndrome than men, and it becomes more common as we age. Genetics play a role too, some people simply have smaller carpal tunnels or are more prone to nerve compression.

Repetitive hand and wrist motions at work or home can contribute, especially if they involve awkward wrist positions, forceful gripping, or vibration. Even activities like typing, holding a phone, driving, or sleeping with your wrist bent can put extra pressure on the median nerve. However, carpal tunnel syndrome is not solely caused by computer use, it's far more complex than that.

Diagnosis

Diagnosis starts with your story. Your hand surgeon will ask about your symptoms, when they occur, what makes them better or worse, and whether you've noticed any weakness or dropping objects. A physical exam follows, testing sensation in your fingers and hand, checking muscle strength, and performing specific maneuvers that can reproduce your symptoms.

In many cases, the diagnosis is clear from the history and exam alone. Sometimes additional testing helps confirm the diagnosis or rule out other conditions. This might include nerve conduction studies and electromyography, which measure how well the median nerve is working. X-rays, ultrasound, or MRI may be ordered if there's concern about arthritis, a fracture, or other structural problems in the wrist.

Treatment Options

The goal of treatment is to relieve pressure on the median nerve and reduce symptoms. If your symptoms are mild, infrequent, or have been present for only a short time, non-surgical options are often effective. A wrist splint worn at night keeps your wrist in a neutral position and can reduce pressure on the nerve during sleep. Anti-inflammatory medications may help if swelling is contributing to your symptoms. A corticosteroid injection into the carpal tunnel can provide temporary relief by reducing inflammation.

Hand therapy can also be helpful. A therapist can teach you exercises, recommend activity modifications, and help you identify positions or movements that worsen your symptoms. These conservative treatments work best when started early.

If symptoms are severe, constant, or haven't improved with non-surgical treatment, surgery may be the best option. Carpal tunnel release is one of the most common and effective hand surgeries. The procedure involves cutting the ligament that forms the roof of the carpal tunnel. This creates more space for the nerve and immediately relieves pressure. The surgery can be done through a small open incision or endoscopically through tiny incisions, depending on your anatomy and your surgeon's recommendation.

Surgery: What to Expect

Carpal tunnel release is typically performed as an outpatient procedure, meaning you go home the same day. The surgery is done under local anesthesia, with sedation available for select cases if needed. The procedure itself takes about 15 to 20 minutes. Once the ligament is released, the nerve has more room, and pressure is relieved right away.

After surgery, your hand will be wrapped in a soft dressing. You'll be able to move your fingers immediately, and you're encouraged to do so to prevent stiffness. Most people experience some soreness in the palm where the incision was made, but this improves over the first few weeks. Stitches are typically removed about two weeks after surgery, though some surgeons use dissolvable sutures.

Numbness and tingling often improve quickly, sometimes within days. If the nerve has been compressed for a long time, recovery may take several months. Grip strength gradually returns as the incision heals and you regain confidence using your hand.

Recovery

Recovery varies depending on your job, how severe your symptoms were before surgery, and how long the nerve was compressed. People with desk jobs may return to work within a few days, while those with physically demanding jobs may need several weeks before resuming full duties.

You'll receive a home exercise program that includes finger and wrist mobility exercises along with scar massage techniques. These exercises help restore strength and flexibility as you heal. Most people can manage their recovery well with these home exercises, though formal hand therapy is available if needed. Most people regain normal hand function within six to twelve weeks, though full recovery can take up to six months in some cases.

Complications from carpal tunnel release are rare. Occasionally, symptoms may return if scar tissue forms or if the underlying cause of nerve compression wasn't fully addressed. Your surgeon will discuss what to expect and how to optimize your recovery.

When to See a Specialist

If you're experiencing numbness, tingling, or weakness in your hand that's affecting your sleep, work, or daily activities, it's worth getting evaluated. Early treatment can prevent permanent nerve damage and help you avoid more invasive interventions down the line. Don't wait until you've lost significant strength or developed muscle wasting at the base of your thumb.

Dr. Lackey specializes in diagnosing and treating carpal tunnel syndrome and other hand and wrist conditions. If you're not sure whether your symptoms are carpal tunnel syndrome or something else, an evaluation can provide clarity and a path forward.