Child Swollen Lymph Nodes in Neck: When Should You Worry?

Yes, in most cases. Swollen lymph nodes (glands) in a child's neck are very common and usually mean the body is fighting a nearby infection, such as a cold, sore throat or ear infection. The American Academy of Pediatrics (AAP) says enlarged nodes are common and expected, especially in children under 5.

Most of these are called reactive nodes. They swell because they are doing their job, then shrink slowly as the infection clears. The AAP notes that cancer is rare in children and most swollen nodes are caused by infections and are not serious.

This guide helps parents and carers know what is usual and when to ask for a check. It cannot examine a lump or diagnose its cause.

Some symptoms need help the same day, whatever the lymph nodes look like. Seek urgent or emergency care if your child:

• Has difficulty breathing, or finds it very hard to swallow, including their own saliva.
• Has a rash that does not fade when a glass is pressed against it.
• Has a stiff neck or dislikes bright lights.
• Is drowsy and hard to wake, not responding normally, or confused.
• Has blue, grey, pale or blotchy skin, lips or tongue.
• Is a baby under 3 months with a temperature of 38°C or higher, or is aged 3 to 6 months with 39°C or higher.
• Is bruising or bleeding easily or for no clear reason.
• Has a node that grows quickly, or the skin over it turns red or purple.

The NHS says swollen glands are usually caused by common illnesses such as colds, tonsillitis and ear or throat infections. The AAP adds sinus infections and dental problems such as cavities or gum inflammation.

Viral infections such as glandular fever can also cause swollen neck glands, often with a sore throat, high temperature and tiredness. The NHS notes it mainly affects teenagers and young adults.

Sometimes the node itself becomes infected, usually by bacteria. This is called lymphadenitis. The AAP describes these nodes as red, warm, painful and larger, often with a fever. A doctor needs to assess an infected node, as antibiotics may be needed.

Rarely, swollen glands are caused by leukaemia or lymphoma. The NHS advises against self-diagnosing and says to see a GP if you are worried.

The NHS says glands swollen by an infection usually get better by themselves within 1 to 2 weeks, depending on the cause. The AAP says many swollen nodes shrink within a few weeks, but some take longer to return to normal size.

Guidance on when to seek review differs slightly between sources. The NHS suggests seeing a GP if glands have not gone down within 1 week or are getting bigger. The AAP advises calling the doctor if a node stays swollen and tender for more than 5 days. If a node stays enlarged for more than 4 weeks, the AAP says an ultrasound and blood tests may be done to look for other causes.

Follow your own doctor's advice on timing.

The AAP explains that normal size depends on location and age, and that younger children have larger nodes. It gives approximate normal sizes of about 1 cm (around 0.4 inches) in the neck and underarm, and about 1.5 cm in the groin.

Size is only one feature. Doctors also consider how the node feels, whether it moves, where it is, how long it has been there and whether the child has other symptoms.

The NHS and the AAP both list features that warrant a visit to a doctor. Book an appointment if a node:

• Keeps getting bigger, or has not gone down within the timeframes above.
• Feels hard, is fixed in place or does not move when pressed.
• Is just above or below the collarbone.
• Appears without any other sign of illness or infection.
• Comes with night sweats, an ongoing high temperature, unexplained weight loss, extreme tiredness or loss of appetite.
• Appears alongside swollen nodes in several parts of the body, such as the armpits or groin.

The AAP describes a doctor examining the swollen node, feeling for enlarged nodes in other parts of the body and looking for the source of an infection, such as the throat, ears or teeth.

It helps to tell the doctor about other symptoms, including cough and fevers, as well as contact with animals and any recent travel. These details can point to a cause that is not obvious from the lump itself.

If the node itself is infected, the AAP says it is usually treated with antibiotics. Draining the node is rarely needed and is usually considered only if antibiotics have not worked. For a reactive node with a clear cause, the usual plan is to watch and wait while the infection settles.

Most children do not need tests. If a node stays enlarged beyond the expected time or has concerning features, the doctor may arrange an ultrasound scan or blood tests and explain what they are looking for.

Note when you first noticed the swelling, whether it has changed, any recent illnesses, fevers, dental problems, animal scratches or travel. Then consider asking:

• Does this look like a reactive node from a recent infection?
• Is the node itself infected, and does it need treatment?
• How long would you expect it to take to go down?
• What changes should make me bring my child back sooner?
• Is an ultrasound or blood test needed now, or only if it persists?
• When should we review it again, and who should I contact?

On SameCase, patients and verified doctors share de-identified cases. Seeing how other families described a child's swollen neck glands, how long the swelling lasted and which questions they asked can help you prepare for your own appointment.

Other children's experiences cannot tell you the cause of your child's swelling. Use them to plan your questions, and rely on your child's doctor for assessment. If an ultrasound has already been done, the related guide on a swollen lymph node with a normal ultrasound may help.