Medical Oncologist
CION Cancer Clinics
Arm numbness after axillary dissection | CION Cancer Clinics
Numbness on the inside of the upper arm and the back of the armpit is expected after an axillary lymph node dissection. A small skin nerve runs straight through the nodes that were removed, and it is stretched or cut during the operation. It carries feeling only, so strength and movement are not affected. The patch usually shrinks over months, and some altered feeling may stay. This page explains what to expect and which changes need the team to look. 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 is the inside of my upper arm numb after the operation?
- Four things people describe, and why they happen
- How the numbness usually changes over time
- What the team means, in plain language
- Which changes are expected, and which need the team to look
- Four things families say about the numbness, and what is true
- Living safely with a numb patch, and what this page cannot tell you
- Common questions about arm numbness after axillary surgery
The short answer
Why is the inside of my upper arm numb after the operation?
Because a small nerve that carries feeling from the skin of the armpit and the inner upper arm runs straight through the lymph nodes that were removed. It is stretched, and often cut, during the operation. The numb patch is expected, it is not a sign of damage to the arm, and it does not affect strength or movement.
What the nerve does and does not do
This is a skin nerve only. It carries touch, temperature and pain from a hand-sized patch on the back of the armpit and the inside of the upper arm. It does not move any muscle. So numbness there does not mean the arm will be weak, and it does not affect the hand or fingers.
Will the feeling come back?
Partly, in many people. Skin nerves regrow slowly and neighbouring nerves take over some of the patch. Over months the numb area usually shrinks and the edges become normal. Some people keep a smaller patch of altered feeling permanently. Where the nerve was cut rather than stretched, full recovery is less likely.
Numbness in the hand or fingers, or weakness lifting the arm, is a different problem and needs to be examined.What it feels like
Four things people describe, and why they happen
The feeling changes as the nerve settles and regrows. Most of what follows is expected, and each has a simple explanation.
A dead, wooden patch
Touching the inner upper arm feels like touching someone else's arm. This is the nerve not carrying signals. It is most complete in the first weeks and usually the first thing to improve at the edges.
Pins and needles, buzzing, electric twinges
These arrive later, often in the second or third month, and are a sign that nerve fibres are regrowing and firing unevenly. They are annoying rather than harmful and usually fade.
Over-sensitive skin
Some people find a shirt sleeve or a light touch unbearable over the area. Gentle, repeated rubbing with a soft cloth several times a day teaches the nerve to tolerate touch again. A physiotherapist can show you how.
A tight or heavy feeling
Often this is not the nerve at all, but the scar, a fluid pocket (seroma) or a tight cord under the armpit. Each has its own page and its own treatment.
Ask about
- Cording, if you can feel a string when you raise the arm
- Seroma, if the armpit sloshes or swells
Not sure whether this applies to you?
Ask an oncologistOver the year
How the numbness usually changes over time
-
The first weeks
The patch is at its largest and most complete. The skin may feel cold or "not yours". This is also when it is easiest to burn or scrape the area without noticing, so check it when you wash.
-
The first few months
Tingling and odd twinges begin as nerve fibres regrow. The edges of the patch start to feel more normal. Sensitivity to clothing can be at its worst in this stretch.
-
Six months to a year
For most people the numb area has shrunk noticeably and the tingling has faded. What is left by now gives a fair idea of what is likely to stay.
-
Longer term
A smaller patch of altered feeling is common and most people stop noticing it. A few have lasting nerve pain in the area, and that has treatments of its own, so do not simply live with it.
Words you may hear
What the team means, in plain language
- Intercostobrachial nerve
- The skin nerve that passes through the armpit nodes. Its name is long, but it only supplies feeling to the inner upper arm and the back of the armpit.
- Sensory nerve
- A nerve that carries feeling, not movement. Damage to a sensory nerve gives numbness or tingling, never weakness.
- Nerve-sparing
- Trying to keep this nerve intact during the operation. It is done when the nodes allow it, and is not always possible without leaving cancer behind.
- Neuroma
- A small tender knot where a cut nerve tries to regrow. It can cause a sharp pain when pressed and has specific treatment.
- Desensitisation
- Rubbing the over-sensitive area with progressively rougher fabrics to retrain the nerve. A physiotherapist teaches it in one session.
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Expected or not
Which changes are expected, and which need the team to look
Expected after axillary surgery
Tell the team
Numb patch on the inner upper arm and back of the armpit
Numbness or tingling in the hand or fingers
Tingling and twinges that come and go over months
Weakness lifting the arm, or the shoulder blade sticking out
Skin that is over-sensitive to sleeves
Burning pain that keeps you awake or is getting worse
A patch that slowly shrinks over the year
New swelling of the arm, hand or fingers
Commonly believed
Four things families say about the numbness, and what is true
"The surgeon cut a nerve by mistake."
The nerve runs through the very tissue that has to come out. Surgeons try to keep it where the nodes allow, and divide it deliberately where leaving it would mean leaving nodes behind. Either way, numbness here is a known part of the operation, not an error.
"Numbness means the cancer was touching the nerve."
It does not. The nerve is disturbed by the operation itself, whatever the nodes contained. People whose nodes were all clear have exactly the same numb patch.
"It will all come back if we wait long enough."
It often improves a great deal, and it may not come back fully. Saying so early lets you get used to the patch rather than watching for a recovery that may not arrive. What is left after about a year is usually what stays.
"I should not use the arm while it is numb."
Using the arm normally is exactly what helps. The numbness is in the skin, not the muscle, and resting the arm leads to a stiff shoulder, which is much harder to put right than a numb patch.
Being straight with you
Living safely with a numb patch, and what this page cannot tell you
A patch of skin that cannot feel heat or pain can be injured without you knowing. Take care with hot water bottles, hair removal, and hot plates carried against the inner arm. Check the area when you wash, and treat any cut or graze there promptly, because infections in this arm matter more after node surgery.
If there is pain rather than numbness
Burning, shooting or electric pain in the area is nerve pain, and ordinary painkillers often do little for it. There are medicines that work on nerve pain specifically, and there are physiotherapy techniques. Ask your surgeon rather than adding tablets on your own, and never change a prescribed medicine without asking the doctor who prescribed it.
Who this page does not fit
After a sentinel node biopsy only, the numb patch is usually smaller and recovery more complete. If your numbness involves the hand, or there is weakness, this page does not explain it and you need to be seen.
What we cannot tell you here
Nobody can say from a page how much of your feeling will return, or when. That depends on whether the nerve was kept or divided, how wide the clearance was, and how you heal. Ask the surgeon what was done to the nerve. It is written in the operation notes.
Questions we are asked
Common questions about arm numbness after axillary surgery
How long does the numbness last?
It usually improves over months rather than weeks. The patch shrinks from the edges and tingling appears as the nerve regrows. What remains after about a year is likely to stay. Many people keep a small area of altered feeling permanently.
Is the numbness a sign the operation went wrong?
No. The skin nerve to the inner upper arm passes straight through the nodes that were removed, so it is disturbed in almost every axillary dissection. Surgeons keep it where they can and divide it where they cannot.
Will the numbness affect my grip or my hand?
It should not. This nerve carries feeling only, and only from the upper arm and armpit. If your hand or fingers are numb, tingling or weak, that is a separate problem, sometimes from position during anaesthesia or from swelling, and it needs to be examined rather than watched.
Why has it started tingling and burning after weeks of nothing?
Because the nerve is regrowing. New fibres fire unevenly, which feels like pins and needles, buzzing or electric twinges. It is a sign of recovery rather than harm. If it disturbs sleep, ask about nerve-pain treatment.
Can I shave or wax the armpit?
Wait until the wound has fully healed and ask your surgeon first. Once allowed, an electric shaver is safer than a blade over skin you cannot feel, and waxing or hair-removal creams can burn or tear numb skin without you noticing.
Does the numbness mean I am more likely to get arm swelling?
Not directly. Lasting arm swelling is linked to how many nodes were removed and whether radiotherapy followed, not to the nerve. The link is indirect: numb skin gets cut or burned without you noticing, and infection in that arm does raise the swelling risk. Care for the skin.
Is there anything that speeds the recovery up?
Nothing reliably makes the nerve regrow faster. What helps is using the arm normally, doing the exercises so the shoulder stays free, and retraining over-sensitive skin with gentle touch. Supplements and oils sold for nerves have not been shown to help.
Who should I see if the pain is not settling?
Start with your surgeon, who can check for a tender nerve knot or a tight cord and refer you on. Physiotherapists, pain specialists and, where needed, the medical oncologist all have options. Call the helpline and describe what you feel; a nurse will arrange the right person.
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Sources
- Cancer Research UK — Possible problems after breast cancer surgery
- Macmillan Cancer Support — Surgery to remove lymph nodes for breast cancer
- American Cancer Society — Lymph Node Surgery for Breast Cancer
- NHS — Breast cancer in women
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
Numbness, tingling or pain that worries you?
Describe what you feel and where. A nurse will say whether it is the expected patch or something a surgeon or physiotherapist should look at. One helpline serves every CION centre.