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The accessory nerve and shoulder problems after neck surgery | CION Cancer Clinics
Shoulder problems after a neck dissection usually come from the accessory nerve, which runs through the neck to the muscle on top of the shoulder. If it is stretched or removed, the shoulder can droop, ache and struggle to lift the arm sideways. When the nerve was kept, strength often returns slowly over months. This page explains why, what helps, and what to ask. CION Cancer Clinics’ surgical oncologists in Hyderabad can talk this through with you.
MI
Medically reviewed by Dr. Mohammed ImaduddinConsultant Surgical Oncologist · MBBS, MS (General Surgery), MCh (Surgical Oncology) · last reviewed September 2026, next review due September 2027
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On this page
- Why does the shoulder hurt after a neck dissection?
- What does accessory nerve weakness feel like?
- How does shoulder recovery usually go?
- How do you find out whether your nerve was kept?
- What do people believe about the shoulder that is not true?
- What small things help at home?
- What do the words in your notes mean?
- Common questions about shoulder problems after neck dissection
The short answer
Why does the shoulder hurt after a neck dissection?
Most shoulder problems after a neck dissection come from one nerve, the accessory nerve, which runs through the neck to the trapezius muscle on top of the shoulder. When that nerve is stretched, bruised or removed, the muscle weakens, the shoulder droops and aches, and lifting the arm to the side becomes hard.
Why this nerve is so exposed
The accessory nerve passes straight through the neck levels where lymph nodes are cleared. To remove the nodes around it, the surgeon has to free the nerve and move it gently aside. Even careful handling can stop it working for a while.
Who is more likely to be affected
The risk is higher when level V, the back of the neck, or level IIB is cleared, and highest when the nerve itself has to be removed in a radical dissection. It is lower after a selective dissection that keeps well away from the nerve, though stiffness can still happen.
Is it permanent?
Often not. When the nerve was kept, strength usually returns slowly as it recovers. When the nerve was removed, some weakness usually stays, but exercises help the shoulder work better.
Recognising it
What does accessory nerve weakness feel like?
People notice different things. You may have one of these or several, and they can change as the weeks go on.
A dropped shoulder
The shoulder on the operated side sits lower and looks rounded forward. Family members often notice it before you do.
Trouble lifting the arm sideways
Raising the arm out to the side above shoulder height becomes hard or impossible. Reaching forward is usually easier.
An aching neck and shoulder blade
A dull ache or pulling pain across the top of the shoulder, often worse by evening or after carrying something.
A shoulder blade that sticks out
The inner edge of the shoulder blade lifts away from the back when you move the arm. Doctors call this winging.
A stiff, frozen shoulder
If the shoulder is not moved enough, the joint itself can stiffen. This is preventable, and the main reason exercises start early.
Not sure whether this applies to you?
Ask an oncologistOver the months
How does shoulder recovery usually go?
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The first days
The neck wound and drains are the main concern. The physiotherapist may start gentle movements on the ward once your surgeon agrees.
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The first weeks at home
Weakness and aching often become more noticeable as you start using the arm again. Keep doing the exercises you were taught, within comfort.
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During radiotherapy, if you need it
Radiotherapy can make the neck and shoulder tighter. Carry on moving the shoulder unless your team tells you otherwise.
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The following months
If the nerve was kept, strength often returns slowly. Recovery of a stretched nerve is measured in months, not weeks.
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If it is not improving
Your surgeon may arrange a nerve test, a physiotherapy review, or a referral to a shoulder specialist. Other options exist, so do not simply put up with it.
Your own operation
How do you find out whether your nerve was kept?
Ask your surgeon, and ask for a copy of the operation note. It records the type of neck dissection, the levels cleared, and whether the accessory nerve was kept or removed. This one detail changes what to expect more than anything else.
If the nerve was kept
The weakness is most likely from stretching or bruising. The nerve is still there and can recover. Regular, gentle exercise keeps the shoulder joint moving while you wait, so that when the muscle strengthens, the joint is not stiff.
If the nerve had to be removed
Surgeons remove it only when cancer is growing on or around it, because leaving it could leave cancer behind. Strengthening the other shoulder muscles helps many people reach, dress and work reasonably well. Occasionally a nerve graft is used, and your surgeon can say whether that was considered.
What this page cannot tell you
It cannot say how far your own shoulder will recover, or how long it will take. That depends on your operation, any radiotherapy and your shoulder before surgery.
When to get it checked sooner
Tell your team if the arm becomes swollen, if pain is getting steadily worse rather than better, or if weakness spreads to the hand. These are not the usual pattern of accessory nerve weakness. They need looking at, even if your next review is still weeks away.
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Commonly believed
What do people believe about the shoulder that is not true?
"Rest the arm completely until the neck heals."
Keeping the arm still for too long lets the shoulder joint stiffen. Gentle movement, as shown by the physiotherapist, protects it. Follow their guidance on what to avoid, rather than stopping all movement.
"Shoulder pain means the cancer has come back."
Shoulder ache after a neck dissection is very common and usually comes from the nerve and muscle. Any new lump or pain that is getting steadily worse should still be checked.
"The surgeon must have made a mistake."
Shoulder weakness can happen even when the nerve is carefully kept. It is a known after-effect that your surgeon should have discussed before the operation.
"Massage and oil will bring the strength back."
Massage may ease the ache, but it does not make the nerve recover faster. Guided exercises are what keep the shoulder moving.
Day to day
What small things help at home?
- Do the exercises you were taught, little and often
- Carry bags in the other hand, or split the load
- Rest the arm on a cushion when sitting for long
- Keep things you use daily below shoulder height
- Ask a family member to help with overhead tasks
- Tell your team if the ache is stopping your sleep
On your notes
What do the words in your notes mean?
- Spinal accessory nerve
- The nerve that powers the trapezius. Your notes may call it cranial nerve XI.
- Trapezius
- The large muscle across the top of the shoulder and upper back that lifts and steadies the shoulder blade.
- Nerve-sparing
- The nerve was identified and kept during the operation.
- Scapular winging
- The shoulder blade lifting away from the back when the arm moves.
- Adhesive capsulitis
- A frozen shoulder, where the joint itself becomes stiff and painful.
Questions we are asked
Common questions about shoulder problems after neck dissection
Will my shoulder go back to normal after neck dissection?
If the accessory nerve was kept, many people regain much or all of their shoulder strength, though it can take months. If the nerve was removed, some weakness usually stays, but exercises help the shoulder work better. Your operation note and your surgeon can tell you which applies to you.
When should I start shoulder exercises?
Your surgeon and physiotherapist will tell you when to start, often while you are still on the ward or soon after going home, once the drains are out. Starting early with gentle movements helps prevent a frozen shoulder. Do not start strong stretches on your own before the wound has healed.
Can I still work or drive with a weak shoulder?
Many people do, with changes. Desk work often resumes sooner than work involving lifting or reaching overhead. Driving needs you to turn your head and move the arms freely, so wait until your team agrees. If your job relies on shoulder strength, tell your surgeon before the operation.
Which pain medicines help the shoulder ache?
Your team may suggest regular paracetamol, or another pain reliever that suits your other medicines and kidneys. Some nerve-type pain responds to different medicines. Ask your doctor rather than buying something over the counter, and do not change a prescribed medicine on your own.
Does radiotherapy make the shoulder worse?
It can make the neck and shoulder tissues tighter, both during treatment and in the months afterwards. Keeping up gentle shoulder and neck exercises through radiotherapy helps. Tell your radiotherapy team if the stiffness is getting worse, so they can arrange physiotherapy support.
Is there a test to check the nerve?
Yes. A nerve conduction study, sometimes with an EMG, uses small electrical signals and a fine needle to check whether the nerve and muscle are working. It is usually done if weakness is not improving as expected. It helps your team plan what comes next.
Can the nerve be repaired if it was removed?
Sometimes. A nerve graft can occasionally be placed during the neck dissection itself. Later, for long-lasting weakness, a shoulder specialist may discuss other procedures. These are not suitable for everyone, and physiotherapy remains the main treatment. Your surgeon can tell you whether any repair is worth discussing.
Who can help me with shoulder physiotherapy?
Ask your surgical team for a physiotherapy referral before you go home. If you live in a district far from Hyderabad, ask for a written exercise plan you can follow locally. You can also call the helpline, which serves every CION centre, if the shoulder is not improving.
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Sources
- American Cancer Society — Surgery for oral cavity and oropharyngeal cancers
- Macmillan Cancer Support — Surgery for cancer
- NHS — Head and neck cancer
- Cancer.Net — Head and neck cancer
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
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Talk to us
Shoulder not improving after neck surgery?
Call the helpline or send us your operation note. A surgical oncologist can explain what was done and what support may help. One helpline serves every CION centre.