Carpal tunnel syndrome: numb fingers at night
A squeezed nerve at the wrist
Dr. Antoine Vasseur
Neurologist
In simple terms
Which fingers are affected and why, plus the treatments from splints to a 15-minute operation.
What it is, in plain words
The median nerve passes through a narrow tunnel at the wrist together with nine tendons. If pressure inside rises, the nerve is compressed and stops conducting properly. Since it supplies the thumb, index, middle and half the ring finger, numbness follows exactly that pattern and spares the little finger.
Signs to look out for
- Numbness and pins and needles in the thumb, index and middle fingers
- Symptoms worst at night, waking you and relieved by shaking the hand
- Tingling when driving, holding a phone or reading a newspaper
- Dropping objects and clumsiness with buttons and keys
- Wasting of the muscle at the base of the thumb in advanced cases
Why it happens
Risk rises with repetitive forceful hand work and vibrating tools, pregnancy, obesity, underactive thyroid, diabetes, rheumatoid arthritis and previous wrist fracture. Many cases have no clear cause.
How doctors confirm it
The history is highly suggestive; examination includes Tinel and Phalen tests. Nerve conduction studies confirm the diagnosis, grade severity and are usually required before surgery. Ultrasound can show the swollen nerve.
Treatments and solutions
- A neutral wrist splint worn at night for six to eight weeks, which resolves or improves many mild cases
- Adjusting workstation, tool grip and taking micro-breaks from repetitive tasks
- A corticosteroid injection into the tunnel, which gives good but often temporary relief and helps confirm the diagnosis
- Treating contributing conditions such as thyroid disease or diabetes
- Surgical release of the transverse ligament, a short day-case procedure with high success, recommended before permanent nerve damage or muscle wasting occurs
Living with it day to day
Do not ignore constant numbness: once the nerve fibres are damaged, recovery after surgery is slower and may be incomplete. Night splints are most effective when worn consistently.
When to seek medical help
See a doctor promptly for constant rather than intermittent numbness, weakness of thumb grip, or visible muscle wasting.
This article explains general health information in simple language. It does not replace advice from your own doctor.
The words explained
Medical terms used above, in everyday language.
- Symptom
- A sign you can feel or see that something is wrong, like pain, tiredness or a rash.
- Diagnosis
- The moment a doctor identifies which illness is causing your symptoms.
- Fibre
- The part of plant foods your body cannot digest; it feeds gut bacteria and helps digestion.
When should you see a doctor?
- Your symptoms last more than a few weeks or keep coming back.
- They get worse quickly, or stop you doing everyday things.
- You notice sudden pain, breathing trouble, fainting or bleeding — seek urgent care.
- You already take medication and want to change anything about it.
This article explains general health information. It does not replace advice from your own doctor.
Frequently asked questions
- What is Carpal tunnel syndrome: numb fingers at night?
- Which fingers are affected and why, plus the treatments from splints to a 15-minute operation.
- What are the main symptoms or signs of Carpal tunnel syndrome: numb fingers at night?
- Common signs vary from person to person. The article above lists the symptoms to watch for, how they progress, and when they need medical attention.
- When should you see a doctor for Carpal tunnel syndrome: numb fingers at night?
- See a doctor if symptoms last more than a few weeks, get worse quickly, stop you doing everyday things, or if you notice sudden pain, breathing trouble, fainting or bleeding.
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