Carpal Tunnel Syndrome: What You Need to Know
Carpal tunnel syndrome (CTS) involves compression or irritation of the median nerve as it travels through a narrow passageway in the wrist known as the carpal tunnel. This tunnel contains tendons responsible for finger movement as well as the median nerve, which provides sensation and movement to parts of the hand. When pressure builds inside this confined space, symptoms such as pain, tingling, numbness, and weakness can occur.
Because our hands and wrists are involved in nearly every daily activity—from typing and driving to lifting and gripping—repetitive stress and prolonged strain can contribute to the development of symptoms. With early diagnosis and appropriate treatment, most people can effectively manage symptoms and restore function. Below is a guide to understanding carpal tunnel syndrome, how it develops, common symptoms, diagnosis, and treatment options.
Why the Carpal Tunnel Matters
The carpal tunnel is essential because it protects structures that allow the hand to function efficiently, including:
• Median nerve function: providing sensation to the thumb, index finger, middle finger, and part of the ring finger
• Hand movement: allowing communication between nerves and muscles responsible for gripping and thumb movement
• Tendon passage: enabling smooth finger movement during everyday tasks
Because the tunnel is naturally narrow, even small increases in pressure or swelling can place stress on the median nerve.
How Carpal Tunnel Syndrome Develops
There are several common ways this condition may occur:
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Repetitive Hand and Wrist Activity
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Repeated wrist movements, prolonged gripping, typing, use of vibrating tools, or repetitive tasks can irritate tissues surrounding the nerve over time.
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Tendon Inflammation and Swelling
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Inflammation of the tendons inside the carpal tunnel can reduce available space and compress the median nerve.
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Prolonged Wrist Positioning
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Holding the wrist in bent or awkward positions for long periods can increase pressure inside the tunnel.
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Underlying Medical Conditions
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Certain health conditions can contribute to increased swelling or nerve sensitivity. These include diabetes, arthritis, thyroid disorders, and pregnancy-related changes.
Recognising the Risk Factors
Factors that may increase the likelihood of developing carpal tunnel syndrome include:
• Repetitive hand or wrist movements
• Frequent typing or computer use
• Use of vibrating tools or manual work
• Pregnancy
• Diabetes or thyroid disorders
• Arthritis and inflammatory conditions
• Obesity
• Previous wrist injuries
• Female sex (women are affected more commonly)
How Carpal Tunnel Syndrome May Present (Symptoms)
Symptoms often begin gradually and may worsen over time. Common symptoms include:
• Tingling or numbness in the thumb, index, middle, and ring fingers
• Pins and needles sensations in the hand
• Pain in the wrist or hand
• Burning sensations in the fingers
• Hand weakness or reduced grip strength
• Difficulty holding objects
• Dropping items unexpectedly
• Symptoms that worsen at night or wake you during sleep
• Increased discomfort during activities such as driving, typing, or holding a phone
As symptoms progress, hand weakness and reduced thumb function may become more noticeable.
Diagnosing Carpal Tunnel Syndrome
Diagnosis typically includes:
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History and Physical Examination
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A clinician will assess symptom patterns, work and activity history, hand strength, sensation changes, and perform specific tests that reproduce symptoms.
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Diagnostic Testing
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Nerve conduction studies to evaluate median nerve function
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Electromyography (EMG) to assess nerve and muscle activity
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Ultrasound to visualise nerve irritation
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X-rays if structural problems or arthritis are suspected
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