Lymph node swelling in children

Overview

Lymph nodes are small, bean-shaped glands that are part of the body's immune system. When they swell, it often means the body is fighting an infection.

Yes, swelling of the lymph nodes is common in children, particularly in preschoolers and school-age children.

Swollen lymph nodes can affect children of any age, but they often occur during the first few years of life when the immune system is still developing.

Symptoms

Common symptoms

• A lump under the skin, often in the neck, armpits, or groin.
• The lump may feel tender or sore to the touch.
• Redness or warmth over the swollen area.
• Fever, tiredness, or other signs of illness.

Symptoms in children

• Swelling in the neck is very common, especially near the jaw or behind the ears.
• Children may also have a runny nose, cough, or sore throat if the swelling is due to an upper respiratory infection.
• If caused by a skin infection, the lymph node near the infected area (for example, in the armpit) may swell.

Symptoms in older adults

• Swollen lymph nodes in older children and teens may sometimes be linked to more serious infections or, rarely, other conditions. However, most cases are still due to minor infections.

Causes

Main causes

• Viral infections: common cold, flu, ear infections, or mononucleosis (glandular fever).
• Bacterial infections: strep throat, infected wounds, or tonsillitis.
• Less common causes: certain vaccines, allergic reactions, or very rarely, conditions like lymphoma or tuberculosis.

Risk factors

• Frequent contact with other children (e.g., daycare, school).
• Weak immune system due to illness or medications.
• Not being up to date on vaccinations.

When to see a doctor

See a doctor urgently if:

• If your child has trouble breathing or swallowing.
• If the swelling appears suddenly and is very painful.
• If your child seems very unwell or has a stiff neck.

Book a routine appointment if:

• If swelling lasts more than two weeks without getting better.
• If the node is hard, fixed, or growing large.
• If you have any concerns about your child's health.

Diagnosis

A doctor will ask about your child's symptoms, check for signs of infection, and feel the swollen node(s). They may examine your child's throat, ears, and skin.

Tests that may be done

• Blood tests: to check for signs of infection or other conditions.
• Ultrasound: a painless scan to see the size, shape, and inside of the node.
• Biopsy: taking a small sample of the node (rarely needed) if it doesn't improve or looks unusual.

What to expect at your appointment

The doctor will explain the likely cause and may suggest home care or prescribe medication if a bacterial infection is confirmed. Follow-up appointments may be recommended if the swelling does not resolve as expected.

Treatment

Treatment depends on the cause. Most swollen lymph nodes in children are due to viral infections and do not need medicine – they get better with rest and time.

Self-care at home

• Encourage your child to rest and drink plenty of fluids.
• Use a cool, damp cloth on the swollen area if it feels tender.
• Give over-the-counter pain relief (such as paracetamol or ibuprofen) as advised by your doctor – never give aspirin to children.
• Keep your child away from others if they have a contagious infection.

Medical treatments

If a bacterial infection is diagnosed, your doctor may prescribe antibiotics. For viral infections, antibiotics do not work; treatment focuses on easing symptoms. In rare cases where an abscess (a pocket of pus) forms, a doctor may need to drain it in a clinic or hospital.

When is surgery considered?

Surgery is rarely needed. It might be considered to drain an abscess or to remove a lymph node for biopsy (to check for serious conditions).

Living with this condition

Most children feel better within a week or two as their infection clears. Keep your child comfortable, monitor the swelling, and follow any advice from your doctor. The lump may still be felt for a few weeks after the infection goes away – this is normal.

Lifestyle tips

• Teach your child to wash hands regularly.
• Avoid sharing drinks or utensils during illness.
• Keep up with routine vaccinations.

Diet and exercise

A balanced diet helps the immune system work well. Let your child rest when they are tired, but gentle activity is fine if they feel up to it. Encourage fluids to prevent dehydration.

Mental health and emotional wellbeing

Swollen lymph nodes are usually not a cause for worry, but children may feel anxious about a lump. Reassure them that it's part of how the body fights germs. If your child seems very worried, talk to your doctor for more support.

Prevention

It is not always possible to prevent swollen lymph nodes because they are a normal response to infection. However, you can lower the risk by practicing good hygiene and keeping your child away from sick people when possible.

Vaccines

Keeping your child's vaccinations up to date helps prevent infections (like measles, mumps, and rubella) that can cause lymph node swelling.

Screening programmes

There is no routine screening for swollen lymph nodes. Regular well-child visits allow your doctor to notice any changes.

Complications

If left untreated

• A bacterial infection that is not treated may spread to surrounding tissues or into the bloodstream (sepsis).
• An abscess (pocket of pus) can form, which may need drainage.
• Very rarely, an enlarged lymph node that is not due to infection may be a sign of a more serious condition, such as cancer. Early detection is important.

Long-term outlook

The outlook is excellent for most children. Swollen lymph nodes due to infections typically go away on their own or with simple treatment. For the very rare cases with a more serious cause, modern medicine offers effective treatments, and early diagnosis gives the best chance for a good outcome.

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