Carpal Tunnel Syndrome: Symptoms, Injections & Alternatives to Surgery

What is carpal tunnel syndrome?

Carpal tunnel syndrome occurs when the median nerve is compressed as it passes through the carpal tunnel at the wrist. This narrow space is bordered by bones and a strong ligament.

Symptoms commonly affect the thumb, index and middle fingers and the thumb-side half of the ring finger. Other nerve or neck problems can cause similar symptoms, so the pattern needs assessment.

What symptoms might you notice?

• Tingling, burning, pain or numbness in the hand.
• Symptoms that wake you at night.
• Difficulty gripping or a weak thumb.
• Clumsiness with small tasks or dropping objects.
• Symptoms aggravated by prolonged wrist positions.

Symptoms may initially come and go. Some people shake their hand for temporary relief. Increasingly constant symptoms or loss of function should not be ignored.

Why does it develop?

Several factors may contribute, including wrist anatomy, pregnancy-related swelling, repetitive forceful tasks, prolonged wrist positions and associated health conditions such as diabetes, thyroid disease or inflammatory arthritis.

Often there is no single cause. A clinician can consider relevant health factors as well as your work, activities and symptom history.

How is carpal tunnel syndrome assessed?

Assessment starts with your symptoms and an examination of sensation, strength and relevant movements. The clinician also considers other explanations for hand symptoms.

Not everyone requires every test. Ask which investigation would change the treatment decision in your case.

What can help without surgery?

Night splints and activity changes

A wrist splint that holds the wrist in a neutral position at night may help. Reducing prolonged bent-wrist positions, excessive gripping and aggravating tasks can also be useful.

• Use a comfortable grip and avoid unnecessary force.
• Take breaks and vary repetitive tasks where practical.
• Review tools, keyboard and mouse positions for comfort.
• Ask about appropriate hand therapy or exercises.

These measures do not guarantee prevention or resolve every case. Pain medicines may ease discomfort but do not remove the pressure on the nerve; discuss suitable options with a pharmacist or clinician.

Corticosteroid injection

A steroid injection may relieve symptoms when splinting has not helped enough. Relief can be temporary, and symptoms may return. Suitability depends on the diagnosis and severity.

What is ultrasound-guided nerve hydrodissection?

Hydrodissection uses injected fluid to separate a nerve from surrounding tissues. The clinician chooses the fluid and technique according to the procedure and patient.

It should not be described as cutting away or removing scar tissue. It is also different from surgical decompression, which releases the ligament forming the roof of the carpal tunnel.

Is it an alternative to surgery?

It may be discussed for selected patients, but evidence does not justify promising that it will prevent surgery. Severe compression or progressive nerve dysfunction may need a surgical opinion without delay.

The Evers study cited in the original article examined gliding resistance in cadaver hands. It helps explore a possible mechanism; it does not prove symptom relief or an optimal injection volume in living patients.

Does ultrasound guarantee an accurate, successful injection?

No. Ultrasound helps the clinician visualise the nerve, surrounding structures and needle. A 2021 systematic review found advantages for ultrasound-guided steroid injections on some clinical outcomes compared with landmark guidance.

However, guidance cannot guarantee benefit or eliminate complications. Individual study percentages should not be presented as the risk every patient faces.

When should surgery be considered?

A specialist may recommend decompression when symptoms are severe, nerve damage is suspected or appropriate non-surgical treatment has not helped. Surgery does not always need to wait until every injection option has been tried.

The decision should consider symptom duration, examination, any test results and your priorities. Existing severe nerve damage can limit recovery, which is why timely assessment matters.

When should you seek advice?

Arrange assessment if symptoms disturb sleep, affect daily activities or persist despite initial measures. Seek prompt review for constant numbness, increasing weakness, visible muscle wasting or sudden progression.

After an injection, increasing redness, warmth, swelling or feeling feverish and unwell needs urgent advice from the treating clinician or NHS 111.

Contact The Podiatry Clinics to check the appropriate clinician and appointment for hand or wrist symptoms.