Cervical radiculopathy: neck pain that runs down your arm

Neck pain is one thing. Neck pain with pain, pins and needles or weakness running down your arm is something different — and it has a name. Cervical radiculopathy is what happens when a nerve root in your neck becomes compressed or irritated where it exits the spine.

People search for it as a pinched nerve in the neck, trapped nerve, neck pain going down the arm, or simply why do my fingers keep going numb. It is frightening, because arm symptoms feel serious. The reassuring part comes early in this article.

What is cervical radiculopathy?

Seven bones stack to make your neck. Between most of them, a pair of nerve roots exit — one to each side — and travel down into the shoulder, arm and hand. Each root supplies a reasonably predictable patch of skin and set of muscles.

When one of those roots is compressed or chemically irritated where it leaves the spine, the nerve sends signals the brain interprets as coming from wherever that nerve goes. The problem is in your neck. The symptom appears in your arm. That mismatch is the single most confusing thing about this condition, and the reason people spend months treating an elbow or a wrist that was never the problem.

What compresses the nerve

• Age-related changes — the most common cause over 50. Discs lose height, joints thicken, and the small opening the nerve passes through narrows. This is normal ageing, not damage.
• A disc bulge or herniation — more common under 50. Disc material presses on or irritates the root.
• Inflammation around the nerve, which can cause symptoms with very little mechanical pressure at all.
• Sustained postures and sudden load changes — rarely the root cause, frequently the trigger.

What it feels like

• Pain from the neck or shoulder blade travelling down the arm, often in a stripe rather than spread over the whole limb
• Pins and needles or numbness in specific fingers
• Weakness — a weaker grip, difficulty lifting the arm, dropping things
• Symptoms worse looking up, or turning and tilting the head towards the painful side
• Relief from putting your hand on top of your head — an oddly specific sign, and a genuinely useful clue
• Night pain, and difficulty finding a comfortable pillow position

Which fingers point to which level

Not a diagnosis, but a pattern clinicians use:

• C5 — shoulder and upper outer arm; shoulder weakness
• C6 — down to the thumb and index finger; biceps and wrist weakness
• C7 — down to the middle finger; triceps weakness
• C8 — down to the ring and little fingers; hand grip weakness

C6 and C7 account for the large majority of cases.

Red flags — read this part

Most cervical radiculopathy is not dangerous. A small number of presentations are, and they need same-day medical assessment rather than physiotherapy. See a doctor urgently or go to an emergency department if you have:

• Symptoms in both arms, or in the legs as well
• Clumsiness in the hands — dropping things, trouble with buttons or keys
• Unsteadiness walking, or a change in your balance
• Any change in bladder or bowel control
• Rapidly worsening or severe weakness
• Neck pain with fever, unexplained weight loss, or a history of cancer
• Neck pain following significant trauma such as a car accident or a fall

Those can indicate pressure on the spinal cord itself rather than a single nerve root, and that is a different and more urgent problem.

The reassuring part

The clinical practice guidelines published in the Journal of Orthopaedic & Sports Physical Therapy note that many patients with acute cervical radiculopathy have a favourable clinical course, with symptoms resolving over weeks to months.

That is worth sitting with, because an arm that is numb and painful does not feel like something that will resolve on its own. Most of the time, it does.

Being equally honest about the evidence for treatment: systematic reviews of conservative care for cervical radiculopathy generally describe the evidence as low certainty. Studies are small and often at risk of bias. That does not mean treatment does not help — it means the research is not strong enough to make confident claims about exactly which treatment is best, and anyone telling you otherwise is going beyond what is known.

Do I need a scan?

Usually not at the start. MRI shows disc bulges and age-related narrowing in large numbers of people with no symptoms whatsoever, so a scan often finds something that was already there and has nothing to do with your pain. Imaging matters when red flags are present, when weakness is significant or progressing, or when symptoms are not settling and a specialist opinion is being considered.

Physiotherapy management may include

• Screening first — nerve testing, reflexes, strength and sensation, plus the red flag questions above.
• Explaining what is happening, which measurably changes outcomes because it changes what feels dangerous.
• Positions and movements that reduce symptoms, and short-term modification of those that provoke them.
• Neural mobility work — gentle techniques to restore the nerve's ability to glide, used carefully and progressed by response.
• Manual therapy to the neck and upper back to improve movement and comfort.
• Strengthening for the deep neck flexors, shoulder blade and shoulder — usually the part that holds the gains.
• Traction, which some people find helpful, though the evidence for it is weak and it is not a cornerstone.
• Sleep and workstation advice — pillow height, screen position, and how long you hold one posture.
• Referral onward where weakness is progressing or symptoms are not improving, so a medical or surgical opinion can be arranged.

How long does it take?

Many people improve over six to twelve weeks, though some take longer and a minority need a specialist opinion. Nerve symptoms often follow a particular pattern as they settle: the pain eases first, then the pins and needles, and numbness can be the last thing to go — sometimes lingering for months after everything else is comfortable. That is normal nerve recovery and not a sign of failure.

What you can do now

• Keep moving within comfort. Total neck rest tends to stiffen things and rarely helps.
• Try the hand-on-head position when the arm is aching — if it helps, that is useful information for your assessment.
• Sort out sleep. A pillow that keeps your neck in line with your spine, and avoiding sleeping on the painful arm.
• Raise your screen and break up long periods in one position.
• Note the pattern. Which fingers, what makes it worse, and whether anything has genuinely become weak. It shortens the assessment considerably.

Getting seen in Adelaide's west

You do not need a referral to see a physiotherapist in Australia — but if any red flag above applies, see a doctor first.

If your GP has written a Chronic Condition Management Plan, we bulk bill those sessions in full. We claim every registered Australian health fund on the spot through HICAPS, and handle NDIS, DVA, work injuries and motor accident claims.

We are at 177 Trimmer Parade, Seaton SA 5023 with free off-street parking, seeing people from Findon, Fulham Gardens, West Lakes, Woodville, Grange, Henley Beach, Royal Park and Kidman Park. Our physiotherapists speak English, Hindi and Gujarati — see languages we speak.

More on our cervical radiculopathy page and our wider neck pain pages, or book online. You can also call 0403 907 587.

This article is general information, not individual medical advice. Arm symptoms arising from the neck require proper assessment, and the red flags listed above need medical review rather than physiotherapy in the first instance. Please discuss your own symptoms with a qualified health professional.