What is Carpal Tunnel Syndrome?

What is Carpal Tunnel Syndrome?

Carpal tunnel syndrome is one of the most common nerve conditions affecting the hand and wrist. It develops when the median nerve, which runs from the forearm into the hand, becomes compressed inside a narrow passageway in the wrist called the carpal tunnel. Left untreated, the condition tends to worsen over time, so understanding the early warning signs and treatment options can help protect the long-term function of your hand.

Understanding the Carpal Tunnel

The carpal tunnel is a narrow, rigid passage on the palm side of the wrist. It is bordered by small wrist bones called the carpal bones on the bottom and sides, and by a tough band of connective tissue called the transverse carpal ligament on top. Nine flexor tendons and the median nerve travel through this passage on their way from the forearm to the hand.

The median nerve controls sensation in the thumb, index finger, middle finger, and part of the ring finger. It also supplies the muscles at the base of the thumb that allow you to grip and pinch. When tissue inside the tunnel swells or thickens, the space available for the nerve shrinks, and the nerve becomes compressed. That compression is what produces the pain, numbness, and weakness associated with carpal tunnel syndrome.

What Causes Carpal Tunnel Syndrome?

Carpal tunnel syndrome rarely results from a single injury. Instead, it usually develops gradually as a result of one or more contributing factors, including:

• Repetitive hand and wrist motion. Frequent typing, assembly line work, or activities that involve prolonged gripping can irritate the tendons that share space with the median nerve.
• Wrist position. Holding the wrist bent, either flexed or extended, for long periods increases pressure inside the tunnel.
• Health conditions. Diabetes, thyroid disorders, and rheumatoid arthritis are all linked to a higher risk of nerve compression.
• Pregnancy. Fluid retention during pregnancy can cause swelling that narrows the carpal tunnel, often resolving after delivery.
• Anatomy. Some people are simply born with a smaller carpal tunnel, which can run in families.
• Wrist trauma. Fractures, dislocations, or significant swelling from an injury can crowd the space around the nerve.

Recognizing the Symptoms

Symptoms of carpal tunnel syndrome typically follow the path of the median nerve and tend to progress in stages.

Early Symptoms

• Numbness or tingling in the thumb, index, middle, and part of the ring finger
• A sensation that the hand has fallen asleep, especially at night
• Mild discomfort that improves after shaking out the hand

Advanced Symptoms

• Persistent numbness that no longer resolves with movement
• Weak grip strength or difficulty holding small objects
• Clumsiness when buttoning clothing or picking up items
• Visible muscle wasting at the base of the thumb in severe, long standing cases

Symptoms often worsen at night because many people sleep with their wrists bent, which increases pressure on the nerve. Daytime activities that require a sustained grip, such as driving, holding a phone, or using tools, can also bring on symptoms.

Who Is Most at Risk?

Carpal tunnel syndrome can affect anyone, but it is more common in people whose jobs or hobbies involve repetitive hand motion, such as office work, manufacturing, and certain sports. Women are diagnosed more often than men, in part because the carpal tunnel tends to be smaller in women. Age also plays a role, with most cases occurring between 40 and 60 years old, though carpal tunnel syndrome can develop at any age.

How Is Carpal Tunnel Syndrome Diagnosed?

A hand specialist will typically begin with a physical examination and a review of your symptoms, medical history, and daily activities. Specific tests, such as tapping over the nerve or holding the wrist in a flexed position, can help reproduce symptoms and confirm the diagnosis. In many cases, a nerve conduction study is used to measure how well electrical signals travel through the median nerve. X-rays may also be ordered to rule out arthritis or a wrist fracture as the source of symptoms.

Treatment Options

Nonsurgical Treatment

Mild to moderate cases often respond well to conservative care. Common nonsurgical options include:

• Wearing a wrist splint, particularly at night, to keep the wrist in a neutral position
• Taking anti-inflammatory medication to reduce swelling and discomfort
• Modifying repetitive activities or adjusting a workstation to reduce strain
• Nerve gliding exercises to encourage the median nerve to move more freely
• A corticosteroid injection to temporarily reduce inflammation inside the tunnel

Surgical Treatment

When symptoms persist despite conservative treatment, or when nerve testing shows significant compression, carpal tunnel release surgery may be recommended. During this procedure, the surgeon divides the transverse carpal ligament to relieve pressure on the median nerve. The surgery can often be performed using a minimally invasive endoscopic technique, which typically allows for a quicker return to daily activities compared to traditional open surgery. You can learn more about what to expect on our carpal tunnel surgery page.

When to See a Hand Specialist

Early intervention gives you the best chance of avoiding permanent nerve damage. If you are experiencing numbness, tingling, or weakness in your hand that interferes with sleep or daily tasks, it is worth having a hand specialist evaluate your carpal tunnel symptoms before they progress. Our team also treats a wide range of related wrist conditions that can produce similar symptoms, so an accurate diagnosis is an important first step toward effective treatment.

Schedule an Evaluation Today

If hand numbness, tingling, or weakness is affecting your daily life, do not wait for symptoms to worsen. The specialists at Orlando Hand Surgery Associates have extensive experience diagnosing and treating carpal tunnel syndrome, from conservative bracing to advanced surgical care. Request an appointment today or visit one of our convenient Central Florida locations to get started on a treatment plan that fits your needs.