Carpal Tunnel Syndrome: Causes, Symptoms and Treatment

The Wrist's Narrowest Passage

The carpal tunnel is a narrow passageway on the palm side of the wrist, one of the most common sites of nerve pain in the wrist and hand, bordered by small wrist bones on one side and a tough band of connective tissue called the transverse carpal ligament on the other. The median nerve, along with several tendons, travels through this tunnel on its way to the hand, and because the space is genuinely tight, it doesn't take much swelling or structural change to compress the nerve running through it.

Recognising the Pattern

Carpal tunnel syndrome classically produces numbness, tingling, or a burning sensation in the thumb, index, middle, and half of the ring finger, notably sparing the little finger, which is supplied by a different nerve. This symptom pattern differs from cubital tunnel syndrome, which affects the ring and little finger instead. Night symptoms are a hallmark: many people wake up needing to shake out their hand, the classic presentation of carpal tunnel night pain., because wrist position during sleep often narrows the tunnel further.

As it progresses, grip and pinch strength can weaken, and in more established cases, the muscle at the base of the thumb can visibly lose bulk. Symptoms are often worse with repetitive wrist motion, prolonged typing, or activities that involve sustained wrist flexion or extension.

What Contributes to It

Repetitive hand and wrist use is a well-known contributing factor, but it's rarely the whole story. Pregnancy, thyroid conditions, diabetes, and inflammatory conditions like rheumatoid arthritis can all increase the likelihood of carpal tunnel syndrome by affecting the tissue and fluid balance within the tunnel, which is part of why a thorough history matters as much as an examination of the wrist itself.

In clinic, we see this pattern come up commonly, though certainly not exclusively, in people whose work involves sustained or repetitive wrist loading. Chefs and kitchen hands gripping and chopping for hours, wait staff carrying trays and repeatedly flexing the wrist, tradespeople using vibrating or repetitive hand tools, and office workers typing for long stretches all show up regularly with this presentation, each with a slightly different loading pattern behind it.

Why a Splint Isn't Always the Full Answer

A wrist splint, particularly worn at night, can genuinely help reduce symptoms for some people by keeping the wrist in a neutral position and taking pressure off the nerve. But a splint addresses the position, not necessarily the underlying contributors, tightness through the forearm flexors, reduced nerve glide, or a repetitive strain pattern at work that continues day after day.

A more complete approach usually combines activity and ergonomic modification with soft tissue work, nerve mobilisation, and, where relevant, addressing any systemic factors alongside your GP.

When to Get It Properly Assessed

Occasional tingling after a long day of typing is common and not necessarily a concern. Numbness that wakes you at night, weakening grip strength, or symptoms that persist despite basic changes are worth a proper neurological assessment. We see a steady stream of desk-based and trade patients with this pattern across North Ryde, and catching it earlier generally means a more straightforward recovery.