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A swollen lymph node: when should you worry? | CION Cancer Clinics
Most swollen lymph nodes come from an infection and go down on their own. Get a node checked if there is no clear reason for it, if it keeps growing, feels hard or stuck, or has not gone down within two weeks. Get help the same day if it comes with trouble breathing or swallowing. This page explains what doctors look for and what happens next. At CION Cancer Clinics, our haematology team plans myeloma and lymphoma care with you, discussed at a tumour board and explained in plain words.
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Medically reviewed by Dr. Basudev PokhrelConsultant Haematologist · last reviewed September 2026, next review due September 2027
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The short answer
When is a swollen lymph node worth worrying about?
Most swollen lymph nodes are caused by an infection and go down on their own. A node is worth a doctor's check when there is no clear reason for it, when it keeps growing, or when it has not gone down within two weeks.
What a lymph node is doing
Lymph nodes are small, bean-shaped filters. They sit in clusters in the neck, under the arms and in the groin. When your body fights a sore throat, a tooth infection or a cut on the foot, the nearest nodes fill with immune cells and swell. That is the node doing its job. It is often tender, and it shrinks back once the infection settles.
Why some nodes need a closer look
A node that swells for no reason you can find is different. So is one that keeps getting bigger, feels hard, or does not move under your fingers. These features do not mean cancer. They mean the cause is not obvious, and a doctor should find it. In India, the most common serious cause of a long-lasting neck node is tuberculosis (TB). Lymphoma, a cancer of the immune cells, is less common but is on the same list.
Children get swollen nodes far more often than adults, because they catch so many infections. A node in a child still needs a doctor if it keeps growing or comes with fever and weight loss.
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When a swollen node cannot wait
Go to the nearest emergency department today, or call 108, if a swollen node comes with trouble breathing, noisy breathing, trouble swallowing, or swelling of the face, neck or arms that is getting worse. The same applies to a node that is red, hot and very sore with a high fever and a feeling of being very unwell. Do not wait for a clinic appointment, and do not start leftover antibiotics at home first.
Not sure whether this applies to you?
Ask an oncologistWhat doctors look for
Which features make a node more worrying?
No single feature settles the question. Doctors put several together, along with your age and your other symptoms.
How long it has been there
A node from an infection usually shrinks within a few weeks. One that is still there, or bigger, after that needs a check. Write down the date you first noticed it, because doctors will ask.
How it feels
Soft, tender nodes that move easily are usually from infection. Hard or rubbery nodes, or ones stuck to the tissue around them, need a closer look.
Lymphoma nodes often do not hurt, which is why they are ignored.Where it is
A node just above the collarbone is looked at more carefully than one under the jaw. Nodes swollen in more than one area at once also need an explanation.
What else is happening
Doctors ask about signs across the whole body, not only the lump.
Tell the doctor about
- Drenching night sweats
- Fevers with no infection found
- Losing weight without trying
- Itching all over the body
Side by side
Which pattern does your node look like?
Usually an infection
Needs a doctor to find the cause
Came up with a cold, sore throat or tooth pain
Came up with no illness you can think of
Tender to touch and soft
Firm or hard, and often does not hurt
Moves freely under the skin
Feels stuck in place
Getting smaller week by week
Staying the same or growing
You otherwise feel well
Night sweats, fevers or weight loss as well
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At the clinic
What happens when you get a node checked?
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Questions and examination
The doctor asks when the node appeared, whether it has changed, and about infections, TB contact, travel and weight. They feel the node and check the neck, armpits, groin, liver and spleen for others.
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Blood tests
A complete blood count and a few other tests look for infection or signs that the blood is involved. A normal result is useful, but it does not rule lymphoma out.
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An ultrasound of the node
This shows the node's shape and inner structure. It helps decide whether to watch the node or sample it, and which node to sample.
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A biopsy, if it is needed
A biopsy means taking tissue to look at under a microscope. For suspected lymphoma, doctors usually prefer to remove a whole node or a core of tissue. A fine-needle sample alone is often too small to tell TB, lymphoma and other causes apart.
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The report and the plan
The pathologist's report names the cause. If it is lymphoma, a haematologist (a blood cancer specialist) explains the type and the next tests.
Commonly believed
What do families often get wrong about swollen nodes?
"It does not hurt, so it cannot be serious."
It is often the other way round. Nodes from infection tend to be tender. Nodes from lymphoma and from some other serious causes often do not hurt at all, which is exactly why people wait months before showing them to a doctor.
"We will start TB medicines and see if it goes."
TB treatment should start only after TB is shown on a sample. Starting it on a guess can delay a lymphoma diagnosis by months, and a partial response can confuse the picture further.
"Cutting the node out will make cancer spread."
A biopsy does not spread lymphoma. It is the only way to know what the node is. Delaying it delays the answer, and that is what can change the outcome.
"A normal blood test means we can relax."
Many people with lymphoma have normal blood counts at first. A blood test cannot replace an examination and, where needed, a biopsy.
Being straight with you
What can this page not tell you?
This page cannot tell you what your own node is. No list of features can. A doctor who examines you and, if needed, samples the node is the only way to know.
It cannot give you a timeline to wait out
If you have a separate reason to worry, such as weight loss or night sweats, do not wait for a fixed number of weeks to pass. See a doctor now. If the node came with a clear infection and is shrinking, it is reasonable to watch it and go back if it stops shrinking.
Who to see first
Your family doctor or a general physician is the right first step for most people. If the node has lasted, is hard, or sits above the collarbone, ask to be referred for an ultrasound and a biopsy rather than a repeat course of antibiotics. Bring every earlier report and prescription with you.
If a biopsy has already shown lymphoma, a haematologist should see you next. The type of lymphoma decides the plan.Questions we are asked
Common questions about swollen lymph nodes
How big does a lymph node have to be to worry?
Size alone does not decide it. Doctors look at size together with how long the node has been there, how it feels, where it is and what else you have noticed. A small node that keeps growing can matter more than a larger one that is shrinking after a sore throat. Let a doctor measure and examine it.
Can stress cause swollen lymph nodes?
Stress does not directly make lymph nodes swell. It can make you notice a normal small node you had never felt before, especially if you keep pressing on it. Pressing repeatedly can also make the area sore. If you have found a node, note the date, stop checking it daily, and see a doctor if it stays or grows.
Should I take antibiotics first?
Only if a doctor has found an infection that needs them. Taking antibiotics for a node with no clear cause adds weeks and teaches you nothing. If a doctor does prescribe a short course, agree a date to be checked again, and ask for an ultrasound or biopsy if the node has not gone down by then.
Is a swollen node in the groin less serious than one in the neck?
Groin nodes are common, because the legs and feet pick up small infections and cuts. They are often harmless. They still need a check if they appear without a cause, feel hard, keep growing, or come with night sweats, fevers or weight loss. The same rules apply wherever the node is.
Which weight loss counts as worrying?
Doctors pay attention when someone loses more than a tenth (10%) of their body weight over six months without trying. That is about six kilograms for a person who weighed sixty. Smaller, unexplained weight loss is still worth mentioning. Weigh yourself and write it down before your appointment.
Can a lymph node go down and still be lymphoma?
Yes, sometimes. Some slow-growing lymphomas cause nodes that shrink and swell again over months. A node that comes and goes without a clear infection each time is worth showing to a doctor, rather than being treated as settled because it went down once.
Will I need a PET-CT scan straight away?
Usually not. A PET-CT is used after a biopsy has shown lymphoma, to see where else it is in the body. Before that, an examination, blood tests and an ultrasound are the normal first steps. A scan cannot make the diagnosis on its own; the biopsy does.
Who should I see at CION with a node that has not gone down?
Call the helpline and say how long the node has been there and what tests you have had. The team will tell you whether to start with a physician, a surgeon for the biopsy, or a haematologist if a report already suggests lymphoma. Bring every report and prescription, including old ones.
Your Haematologist
Meet CION's haematologist. One specialist for your blood report and your plan.
Dr. Basudev Pokhrel reviews blood counts, transfusion needs and blood disorders, and works with the CION tumour board on blood cancers.
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Where to find us
Our centres in and around Hyderabad
Addressed by landmark, because that is how this city navigates. A haematology consultation can be booked at any of these centres through one helpline, and your team will tell you where each test or treatment takes place.
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Sources
- NHS — Swollen glands
- American Cancer Society — Signs and symptoms of Hodgkin lymphoma
- Cancer Research UK — Symptoms of non-Hodgkin lymphoma
- NICE — Suspected cancer: recognition and referral (NG12)
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
How long can a swollen lymph node last?The timelines in more detailHard, fixed or not sore: what node feel tells youWhat the feel of a node does and does not tell youTB or lymphoma: a common Indian dilemmaWhy a biopsy matters before TB treatmentLump above the collarboneWhy this one location is checked sooner
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Have a node that has not gone down?
Tell us how long it has been there and what tests you have had. We will help you reach the right specialist. One helpline serves every CION centre.