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Leg lymphoedema after groin node removal: why it happens and what to watch for | CION Cancer Clinics
Leg swelling after groin lymph node removal happens because fluid from the leg has fewer routes to drain. Some puffiness in the first weeks is common and often settles. Swelling that lasts, or appears later, is called lymphoedema. Not everyone gets it, and it can usually be controlled with daily care. This page explains the early signs, the swelling that needs a same-day call and how it is treated. CION Cancer Clinics’ surgical oncologists in Hyderabad can talk this through with you.
MM
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
- Why does the leg swell after groin lymph nodes are removed?
- When can leg swelling start, and how does it change?
- What are the early signs of lymphoedema in the leg?
- What do the words about leg swelling mean?
- Can leg lymphoedema be treated?
- What do families believe about a swollen leg after surgery?
- Common questions about leg lymphoedema after groin surgery
The short answer
Why does the leg swell after groin lymph nodes are removed?
The groin nodes are where lymph fluid from the leg drains on its way back to the heart. When they are removed, that fluid has fewer routes out, so it can build up in the leg and cause swelling. When the swelling lasts, it is called lymphoedema.
Early swelling is not the same as lymphoedema
Almost everyone has some puffiness of the thigh or leg in the weeks after the operation. This comes from the surgery itself and often eases as the wound heals. Lymphoedema is swelling that stays, or that appears later, sometimes months or years after surgery.
Not everyone gets it
Many people who have groin nodes removed never develop lasting swelling. Others have mild swelling that is easy to control. A smaller group has swelling that needs daily care. There is no reliable way to predict in advance which group you will be in.
What this page cannot tell you
It cannot tell you whether your swelling is lymphoedema, a clot or an infection. It cannot tell you how your leg will change over time. Those need an examination, and sometimes a scan.
Over time
When can leg swelling start, and how does it change?
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The first few weeks
Puffiness around the groin and thigh is common while the wound heals and the drain is in. It is usually worse at the end of the day and better after a night lying flat.
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The first months
As you walk more and return to normal life, some people notice the ankle or foot swelling for the first time. Mention it at your follow-up visits even if it seems small.
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Later on
Lymphoedema can first appear long after surgery. It is sometimes set off by an infection, an insect bite, a long journey, radiotherapy to the groin or weight gain.
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If it is not treated
Swelling that starts soft can slowly become firmer as the tissue under the skin thickens. This is harder to reverse. Starting care early, while the swelling is still soft, gives the leg a better chance.
Not sure whether this applies to you?
Ask an oncologistWhat to look for
What are the early signs of lymphoedema in the leg?
The first signs are often felt before they are seen. Compare the two legs, and note changes rather than guessing.
A feeling of heaviness
The leg feels heavy, tight or full, especially after standing or walking for a long time. This can come before any swelling you can see.
Clothes and footwear feel tight
Chappals leave a mark, a toe ring or anklet feels tighter, or trousers pull on one thigh. These small changes are often the first clue.
A dent when you press
Pressing a thumb on the ankle or shin for a few seconds leaves a dent that fills slowly. Doctors call this pitting.
Changes in the skin
The skin can feel tighter, thicker or drier than on the other leg.
Also tell the team about
- Aching in the thigh or knee
- Less bend at the ankle or knee
- Swelling in the lower tummy or genitals
!
Swelling that needs to be seen the same day
A leg that suddenly becomes red, hot and painful, with or without a fever or shivering, can be cellulitis, an infection of the skin. A calf that is painful, tender and swollen on one side, or new breathlessness or chest pain, can be a blood clot. Call the helpline or go to the nearest emergency department the same day. Do not massage the leg or put on a compression stocking while you wait.
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On your notes
What do the words about leg swelling mean?
- Lymphoedema
- Swelling that lasts, caused by lymph fluid not draining properly out of the leg.
- Pitting
- A dent left in swollen skin after it is pressed. Soft, pitting swelling is usually easier to improve.
- Limb volume or circumference
- Measurements of the leg at set points, used to track whether the swelling is growing or shrinking.
- Compression garment
- A firm, fitted stocking or legging that squeezes the leg to stop fluid building up. It is measured for you.
- Lymphatic drainage massage
- A gentle skin massage taught by a trained therapist, which moves fluid towards areas that still drain.
- Cellulitis
- An infection of the skin and the layer under it, more likely in a swollen leg.
Treatment
Can leg lymphoedema be treated?
It can usually be controlled, even though the lymph routes that were removed do not grow back. The aim is to reduce the swelling, stop it getting worse and protect the skin from infection.
How it is assessed
Your team examines both legs, measures them and asks when the swelling began. They may order an ultrasound to rule out a clot. If the cancer could be a cause, they may check that too, because new swelling occasionally has a different reason.
The usual approach
Most people are taught four things by a lymphoedema therapist: daily skin care, regular movement, a well-fitted compression garment and a simple self-massage. For firmer swelling, a period of daily bandaging may come first. Surgery for lymphoedema exists in some centres, but it suits only a small group and the evidence is still limited.
Who compression does not suit
Compression is not safe for everyone. Poor blood flow in the arteries of the legs, an active infection, a fresh blood clot or some heart problems can make it harmful. Your team checks for these first.
Commonly believed
What do families believe about a swollen leg after surgery?
"The swelling means the cancer has spread to the leg."
Most leg swelling after groin node surgery comes from the lymph flow being disrupted, not from cancer. New swelling should still be checked, so the team can find the cause rather than guess.
"Resting the leg completely will make it go down."
Muscles working during walking help pump lymph out of the leg. Long rest makes swelling worse. Raising the leg when you sit helps, but gentle regular movement matters more.
"Hard massage or hot oil will push the fluid out."
Firm or hot massage can damage fragile lymph channels and irritate the skin. The drainage massage that helps is very light and is taught by a therapist.
"If it has not swollen yet, it never will."
Lymphoedema can first appear long after surgery. Keep looking after the skin of that leg and report any new heaviness or swelling, however small.
Questions we are asked
Common questions about leg lymphoedema after groin surgery
Will my leg stay swollen for the rest of my life?
Early swelling after surgery often settles. If lymphoedema develops, it is usually long-term, but it can often be kept under good control with daily care. Many people keep working, walking and travelling. Starting care while the swelling is still soft makes that easier.
Is the swelling painful?
Lymphoedema is more often heavy and aching than sharply painful. Sudden pain, heat or redness is different and may mean infection or a clot, which need to be seen the same day. Tell your team about any pain that is new or getting worse.
Can anything lower the chance of getting it?
Nothing removes the risk, but some things help. Keep to a healthy weight, stay active, protect the skin of the leg from cuts, bites and burns, and treat any skin infection quickly. Report early heaviness, so care can start before the swelling becomes firm.
Does radiotherapy to the groin make it more likely?
Yes, radiotherapy to the groin after surgery can add to the risk, because it also affects the lymph channels. Your team weighs this against the reason the radiotherapy is being offered. Ask them how it changes the risk for you and what care they suggest afterwards.
Can I travel by bus, train or plane?
Yes. On long journeys, move your feet and ankles often, walk about when you can, drink enough water and avoid sitting with your legs crossed. If you have been given a compression garment, ask your therapist whether to wear it while travelling.
Are there tablets that reduce the swelling?
Water tablets are sometimes prescribed for other kinds of swelling, but they do not usually help lymphoedema and can cause other problems. Do not start any tablet or herbal remedy for the swelling on your own. Ask your team what is suitable for you.
Can both legs swell?
Usually only the leg on the side where nodes were removed swells. If nodes were removed from both groins, both legs can be affected. Swelling of both legs can also come from the heart, kidneys or medicines, so tell your team about it.
Who should I see about the swelling?
Start with your surgical team, who will check the cause. They can then refer you to a trained lymphoedema therapist or a physiotherapist with this training. Ask whether this is available where you are having treatment, or near your home district.
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Sources
- NHS — Lymphoedema
- National Cancer Institute — Lymphedema (PDQ), patient version
- Cancer.Net — Lymphedema
- NHS — Cellulitis
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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