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Cording and axillary web syndrome after lymph node surgery | CION Cancer Clinics
The tight, string-like band running from your armpit down your arm after lymph node surgery is called cording, or axillary web syndrome. It is common, it is not the cancer coming back, and it is treated with gentle stretching and physiotherapy rather than rest. This page explains how to recognise it, what treatment involves, and the few signs that mean it is something else. CION Cancer Clinics’ surgical oncologists in Hyderabad can talk this through with you.
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Medically reviewed by Dr. Muralidhar MuddusettyConsultant Surgical Oncologist · MBBS (AIIMS), MS (Surgery, AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh) · last reviewed September 2026, next review due September 2027
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On this page
- What is the tight cord under my arm, and does it need treatment?
- How do I know this is cording and not something else?
- How is cording treated?
- What families tell us about cording, and what is actually true
- Words you may hear, in plain language
- What this page cannot tell you
- Common questions about cording after axillary surgery
The short answer
What is the tight cord under my arm, and does it need treatment?
The tight, rope-like band running from your armpit down the inside of your arm is called cording, or axillary web syndrome. It is a common after-effect of having lymph nodes removed from the armpit. It is not a tumour, it is not the cancer coming back, and it usually settles with gentle stretching and a physiotherapist's help.
What is actually going on
The cords are thought to be lymph channels and small veins that have become inflamed and scarred after the operation. They tighten, and you feel them as one or more strings pulling under the skin. They can run from the armpit to the elbow, and sometimes to the wrist or thumb.
When it tends to appear
Cording most often shows up in the first few weeks after surgery, once the wound has healed and you begin using the arm again. It can also appear later, after radiotherapy or a long spell of resting the arm. It is more common after a full axillary clearance than after a sentinel node biopsy, but it can follow either. Left alone, it limits how far you can lift the arm, which makes radiotherapy positioning harder and can lead to a stiff shoulder.
Cording is treated by movement, not by rest. Resting the arm to protect it is the one thing that makes it worse.Recognising it
How do I know this is cording and not something else?
Cording has a typical pattern. If what you have does not match it, show it to your surgeon.
A string you can feel or see
One or several thin, firm cords under the skin, like guitar strings. They show most when you raise the arm out or up, and may vanish when the arm is down.
A pulling pain on stretching
The pain is a tight, pulling feeling along the cord when you reach up, out or back. At rest there is usually little pain. A constant, throbbing ache is not typical and should be checked.
A limit on lifting the arm
You can lift the arm part of the way and then the cord stops you. Many people notice it first when dressing or combing their hair.
Often felt during
- Dressing and bathing
- Hanging clothes to dry
- Lying flat for radiotherapy planning
What it is not
Cording is not usually hot, red or swollen, and it is not a soft lump. If the arm is warm and puffy, or the skin over the cord is red, that points to infection, a seroma or a clot instead.
A seroma is a pocket of fluid under the wound. It feels soft, not stringy.Not sure whether this applies to you?
Ask an oncologist
!
One thing that cannot wait
A cord that becomes hot, red and tender along its length, or an arm that swells quickly and feels warm, needs to be seen the same day. It may be a skin infection or a clot in a vein, and both are treated very differently from cording. Do not stretch it, massage it or apply hot packs. Call the helpline or go to the nearest emergency department, and say you have recently had lymph nodes removed.
What treatment looks like
How is cording treated?
A physiotherapist checks the arm
Ask your surgeon for a referral to a physiotherapist who works with breast cancer patients. They measure how far the arm moves, feel along the cords, and rule out a stiff shoulder joint, which needs a different plan.
Gentle, sustained stretching
You are shown how to stretch the arm slowly to the point of pulling and hold it there while you breathe. The stretch should feel tight, not sharp. It is repeated several times a day at home.
Hands-on release of the cords
The physiotherapist works along each cord with their fingers, stretching and softening it. Sometimes a cord gives way with a small popping feeling during this. It is not harmful and the arm often moves more freely straight afterwards.
Building the movement back
Once the cords soften, the focus moves to getting full shoulder movement back and keeping it. Warm showers before stretching help. Pain relief taken before the session, if your doctor has prescribed it, makes the stretching easier.
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Commonly believed
What families tell us about cording, and what is actually true
"A cord under the arm means the cancer has spread."
It does not. Cording is scarring in lymph channels and small veins, a reaction to the surgery itself. It has nothing to do with whether the cancer has come back. Your surgeon can confirm this by examining the arm, and no scan is usually needed.
"She must rest the arm completely until it heals."
Rest is the one thing that makes cording worse. The cords shorten when the arm stays still, and the shoulder stiffens alongside them. Gentle daily movement, started as soon as the surgeon allows, is the treatment.
"Stretching will snap something inside and cause damage."
A cord that gives way during a stretch has softened, and this is expected. It does not injure the arm or the wound. Stretching should feel like a strong pull, never a sharp stab. If it feels sharp, ease off and tell the physiotherapist.
"It will go away on its own, so there is no need for physio."
Many cords do fade over time, but waiting has a cost. The shoulder can stiffen meanwhile, and radiotherapy can be delayed because the arm cannot be positioned. A few sessions of physiotherapy early on usually shortens the whole episode.
On your report or in clinic
Words you may hear, in plain language
- Axillary web syndrome
- The medical name for cording. Axilla means armpit; the web is the set of tight cords running out of it.
- Axillary clearance or dissection
- The operation that removes most of the lymph nodes from the armpit. Cording is more common after this than after a sentinel node biopsy.
- Sentinel node biopsy
- Removing only the first few nodes that drain the breast. It can also cause cording, though less often and usually more mildly.
- Range of motion
- How far your arm can move in each direction. The physiotherapist measures it at the start and again as the cords soften.
- Mondor's disease
- A cord-like inflamed vein on the chest wall or breast rather than in the armpit. It looks similar and is also harmless, but it is a different condition.
Being straight with you
What this page cannot tell you
This page cannot tell you that the band under your arm is definitely cording. Most tight cords after axillary surgery are, but a clot or an infection can feel similar at first, and only an examination can separate them.
It cannot tell you how long yours will last
Some cords soften within weeks of starting physiotherapy. Others come and go for months, particularly if radiotherapy follows the surgery. The speed depends on how soon movement began and how regularly the stretches are done at home.
It cannot replace a physiotherapist
Words are a poor guide to how far to push a stretch. A physiotherapist shows you the movement, watches you do it and adjusts it for your arm. Ask your surgical team for a referral to someone who treats patients after breast surgery. Until then, do not stop using the arm. Keep up the gentle exercises you were given after surgery.
If you are between appointments and worried, call the helpline. A nurse will talk it through with you and arrange for a surgeon to look if needed.Questions we are asked
Common questions about cording after axillary surgery
Is cording dangerous?
No. Cording is uncomfortable and limits movement, but it does not damage the arm and it is not a sign of cancer. The real risk is what happens if it is ignored: the shoulder stiffens and the arm becomes harder to lift. Treated early, most people get full movement back.
Can I stretch the cords myself at home?
Yes, once a physiotherapist has shown you how. Raise the arm slowly to the point where the cord pulls, hold it there while breathing steadily, then ease off. Do this several times a day. Stop and ask if the pain becomes sharp rather than pulling.
The cord snapped during a stretch. Have I hurt myself?
Almost certainly not. A small popping feeling during a stretch usually means a cord has softened and given way, and the arm often moves more freely straight away. There may be mild soreness for a day. If the area becomes hot, red or swollen afterwards, have it looked at.
Does cording mean I will get lymphoedema?
Cording and lymphoedema, which is lasting arm swelling, are different problems, though both follow lymph node surgery. Having cording does not mean you will develop swelling. Keeping the arm moving helps with both.
Can cording delay my radiotherapy?
It can, if the arm cannot be lifted far enough to lie in the treatment position. This is one of the main reasons to treat cording promptly. Tell the radiotherapy team as soon as you notice a cord, so physiotherapy can start before planning begins.
Should I massage the cord or use a hot water bag?
Gentle warmth before stretching is fine, and a physiotherapist may work along the cord with their hands. Avoid pressing hard on it yourself. Do not use heat or massage at all if the cord is red or hot, or the arm is swelling, because those signs need a doctor first.
Will the cord come back after it has gone?
Sometimes, especially in the months after surgery or during radiotherapy. A returning cord is treated the same way, with stretching, and usually settles faster the second time. Keeping up a short daily stretch after the cords have gone lowers the chance of this.
Who should I ask for help, and is there a charge?
Ask your surgeon or breast care nurse at your next visit for a physiotherapy referral, or call the helpline and we will arrange it. Whether physiotherapy is covered depends on your scheme or insurer, so ask about this when the referral is made.
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Sources
- Cancer Research UK — Surgery for breast cancer
- Macmillan Cancer Support — Breast cancer
- American Cancer Society — Breast cancer
- National Cancer Institute — Breast 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.
Keep reading
Related pages
Arm Exercises After Axillary DissectionThe daily movements that treat cording and keep the shoulder freeShoulder Stiffness and Frozen ShoulderWhat happens when a cord is left to limit the armSeroma After Axillary SurgeryThe soft fluid swelling that is sometimes mistaken for a cordLymphoedema Risk After Axillary ClearanceThe other arm problem after node surgery, and how it differsAxillary Lymph Node DissectionThe operation itself, and everything that follows it
Talk to us
Noticed a cord under your arm?
Tell us what you have found and when the operation was. A nurse will talk it through with you and arrange for a surgeon or physiotherapist to see the arm. One helpline serves every CION centre.