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Swollen Lymph Nodes in a Child's Neck: When It's Nothing and When to Call the Doctor

A swollen lymph node in your child's neck is often the immune system reacting to a common infection, like a cold, a sore throat, or an ear infection. The American Academy of Pediatrics (AAP) notes that many swollen nodes shrink within a few weeks, though some take longer.

Swollen Lymph Nodes in a Child's Neck: When It's Nothing and When to Call the Doctor
Children's HealthSwollen Lymph Nodeswhen-to-worry
Written By: DocAi Health Editorial Team
Last Updated: 2026-09-30
Medical Disclaimer: This article is for general informational and educational purposes only and is not medical advice. It does not create a doctor-patient relationship and is not a substitute for professional diagnosis or treatment by a qualified healthcare provider. Never disregard or delay seeking professional medical advice because of something you have read here. If you think you may have a medical emergency, call 911 or your local emergency number right away. Health information can change and this guidance is general and US-focused, so consult a licensed clinician in your own country about your specific situation.
A swollen lymph node in your child's neck is often the immune system reacting to a common infection, like a cold, a sore throat, or an ear infection. The American Academy of Pediatrics (AAP) notes that many swollen nodes shrink within a few weeks, though some take longer. What separates a lump you can watch from one that needs a doctor's exam is how it feels, whether it is growing, and how long it lasts. This article covers the usual causes, the warning signs worth a call, and what to expect at the pediatrician's office.

What Counts as a Swollen Lymph Node in a Child's Neck

Children have small, bean-shaped lymph nodes scattered through the neck: under the jaw, in front of and behind the ears, along the sides of the neck, and at the base of the skull. They filter fluid and help the immune system respond to germs, and because young kids meet new germs constantly, the AAP describes enlarged nodes from time to time as both common and expected in children, especially those younger than 5.
Size varies with a child's age and where the node sits. The AAP puts lymph nodes in the neck at around 1 centimeter and notes that younger children have larger nodes, while MedlinePlus counts a node in a child as enlarged once it is more than 1 centimeter (0.4 inch) wide and advises contacting a provider about it. Size alone cannot tell a harmless node from a worrying one, so doctors also consider whether it is soft or hard, moves freely or feels fixed, is tender or painless, and is growing or shrinking.
One location deserves extra attention. A node above the collarbone, called a supraclavicular node, is less typical than nodes under the jaw or along the neck, and the AAP lists it among the reasons to call your child's doctor right away, even if it feels small.

The Usual Reasons a Child's Neck Glands Swell

Most of the time, a swollen node in a child's neck is the immune system doing its job: responding to an infection or inflammation nearby. The AAP says most swollen lymph nodes in children are caused by infections and are not serious.

A Cold, Ear Infection, or Sore Throat (Reactive Swelling)

A common reason for a swollen neck gland in a child is an ordinary infection such as a cold, a sinus infection, an ear infection, or a sore throat, and the AAP also lists dental problems such as cavities or gum inflammation. Reactive nodes are often about pea-sized or a little larger, commonly feel soft, slide easily under your fingers, and may be a little tender.
These reactive nodes often swell while the illness is under way, and the AAP says they usually shrink slowly over several weeks. A reactive node generally improves on its own, so care is aimed at the cold or ear infection itself. If the node is still enlarged after about a month, or a new fever shows up after the illness had passed, it is worth a call.

Strep Throat

Group A strep often causes tender, swollen nodes at the front of the neck along with a sore throat and fever, and the CDC lists those nodes among the symptoms. Strep is hard to tell apart from a viral sore throat by symptoms alone, so clinicians test when it is suspected; for a full breakdown of symptoms and testing, see Is My Child's Sore Throat Strep? How to Tell. Swollen nodes from a bacterial throat infection usually improve as the infection responds to treatment.

A Single Red, Warm, Very Tender Node (Bacterial Lymphadenitis)

Sometimes one specific node becomes infected directly, often by staph or strep bacteria that entered through a scratch, a bug bite, a cut, or an infection of the mouth, teeth, or throat near that node. This is called bacterial lymphadenitis, and it looks different from reactive swelling: the AAP describes a node that may become red, warm, painful, and larger, in a child who often has a fever.
Bacterial lymphadenitis often needs antibiotics prescribed after an in-person exam to confirm the diagnosis and pick the right medication. If antibiotics are started, expect a recheck, and tell the office if the node is not getting smaller or your child seems sicker. Some infected nodes form a pocket of pus, called an abscess, that feels soft or squishy in the center, and the AAP notes that an infected node may eventually need drainage if antibiotics do not work.
Uncommonly, that kind of infection spreads to the deeper spaces of the neck and affects breathing or swallowing, or it moves into the bloodstream and makes a child look very sick. Trouble breathing or swallowing, swelling that is spreading fast, skin over the neck that is turning dark red or purple, or a child who is unusually hard to wake can be signs of a spreading or serious infection. A high fever with a stiff or very painful neck, or a rash that does not fade when pressed, can signal a bloodstream infection or meningitis. All of these need emergency care right away, not a next-day appointment.

Cat Scratch Disease

Cat scratch disease is caused by Bartonella henselae, a bacterium carried by many healthy cats and kittens, and it can spread through a scratch or bite. The AAP says it takes a week or more after the scratch for the first symptoms to appear. The lymph node that drains that area then swells; after a scratch on the face or scalp, that node is often in the neck. The skin over it can be warm, red, and tender, and some children also have a fever, headache, or tiredness.
Most uncomplicated cases resolve without antibiotics, and the AAP says the infection and the node swelling usually go away on their own in 2 to 4 months, though antibiotics may speed recovery. MedlinePlus adds that a child with a weak immune system can become more seriously ill and may need antibiotics. Such a child should be seen promptly. Tell your pediatrician about any swollen node after a cat scratch or bite, even if it happened weeks earlier, and call promptly if the node keeps growing or becomes very painful.

Mononucleosis

Mononucleosis, or "mono," is usually caused by the Epstein-Barr virus and shows up most often in older kids and teenagers. The CDC lists swollen lymph nodes in the neck among its symptoms, along with an inflamed throat, fever, and fatigue. Mono can also enlarge the spleen, which sits under the left ribs, and an enlarged spleen is more fragile than usual.
Because of that spleen risk, a doctor who suspects mono may ask your child to avoid contact sports, wrestling, and rough play until cleared, since a hard hit to an enlarged spleen can, uncommonly, cause it to rupture. The CDC says people who get symptoms from EBV usually get better in 2 to 4 weeks, though some feel fatigued for several weeks or even months. Rest, fluids, and treating fever and sore throat as needed are the main tools.

When a Swollen Node Deserves a Closer Look

A small number of swollen neck nodes need more than watchful waiting. These features are uncommon, but it helps to know what does not fit the everyday pattern. The AAP lists several of the following among the reasons to call your child's doctor right away:
  • The node is growing quickly, or keeps getting bigger over several days instead of staying the same size or shrinking.
  • It feels hard, rubbery, or fixed in place rather than sliding under your fingers, especially if it does not hurt when pressed. These features do not by themselves mean cancer or another serious disease, but they are reasons for an exam.
  • It is still enlarged after about four weeks, or it has been swollen and tender for more than five days.
  • It sits above the collarbone (supraclavicular), even if it feels small.
  • Swollen nodes appear in several areas of the body, such as the neck and the armpit or groin.
  • It shows up along with an ongoing fever above 101°F (38.3°C), night sweats, unexplained weight loss, easy bruising or bleeding, or extreme tiredness, lethargy, or loss of appetite.
One specific pattern worth knowing by name is Kawasaki disease, an uncommon illness that inflames blood vessels, mostly in children under 5. According to the AAP, it can cause a fever lasting at least five days with a swollen, tender lymph node on one side of the neck, red eyes without pus, very red or cracked lips or a strawberry-like tongue, a rash, and swollen, red hands and feet, though not every child has all of these features at once. Without treatment it can affect the coronary arteries around the heart, so MedlinePlus advises contacting your child's provider if a fever has lasted 4 days, especially with other symptoms of Kawasaki disease.
Uncommonly, a node that is painless, hard, fixed, and keeps growing for weeks without an infection to explain it can be a sign of a more serious condition, including certain cancers of the lymphatic system. The AAP describes cancer as a rare cause of swollen lymph nodes in children. No single feature establishes it on its own. Your pediatrician will want to examine a node like this in person.

What Happens at the Pediatrician's Visit

Your pediatrician will ask when you first noticed the node, whether it has grown, shrunk, or stayed the same, and whether your child has had a fever, sore throat, weight change, rash, recent scratches or bites, or travel. They will check the node's size, texture, mobility, and tenderness, feel for other enlarged nodes, and check the throat, ears, and skin for a source of infection.
Many swollen nodes are diagnosed from this history and exam alone, without any tests. If strep is suspected, a throat swab test can help identify it. If the exam points toward bacterial lymphadenitis, your pediatrician may start antibiotics and plan a recheck. When the cause is not clear, or a node has features from the list above, blood work, an ultrasound, or a referral to a pediatric ear-nose-throat specialist may follow, particularly if a node stays enlarged beyond about four weeks. A biopsy, where part or all of a node is removed and examined under a microscope, is uncommon and generally reserved for nodes that do not fit a typical pattern or raise concern.

Caring for a Swollen Node While You Watch

While you watch a node your pediatrician has already looked at, or before an appointment for a mild case, a few things may help. Acetaminophen or ibuprofen may ease the discomfort of a tender node when appropriate for your child's age, weight, and health, so follow the product label or your pediatrician's dosing instructions, and check with your pediatrician first if your child is very young, dehydrated, or has a medical condition. Do not give aspirin unless a health care provider directs it, because it can cause Reye syndrome in children. A warm, damp washcloth held gently against the area for a few minutes may also ease soreness. Keep treating the cold, ear infection, or sore throat that caused the swelling, and call your pediatrician if you notice signs of dehydration, such as much less urination, a dry mouth, no tears when crying, unusual sleepiness, or trouble keeping fluids down.
Check the node every few days, either by feel or with a quick photo next to a ruler for scale, so you can tell whether it is shrinking, staying the same, or growing. If a node remains enlarged for about four weeks, keeps growing, or if anything on the warning-sign list above develops, contact your pediatrician rather than continuing to wait.

When to Seek Medical Care

When to Seek Urgent or Emergency Care

Most swollen neck glands in children are not an emergency and can be watched at home or checked at a routine visit. The situations below are different: they can signal an infection affecting breathing or swallowing, an infection that has spread beyond the lymph node, or another serious problem. For the second list, call your child's doctor right away so the team can decide how soon to see your child. This guidance is in addition to, not a replacement for, the general disclaimer above.

Emergency, call 911 or go to the emergency room immediately if:

  • Trouble breathing, or breathing that is fast, noisy, or looks like hard work.
  • Trouble swallowing, or your child is unable to swallow their own saliva.
  • The swelling is spreading quickly across the neck or face, the skin over it is turning dark red or purple, or your child looks very sick, extremely lethargic, or is hard to wake.
  • A high fever together with a stiff or very painful neck, or a rash that does not fade when you press on it.
  • Sudden, severe belly pain, especially on the left side, in a child who has or recently had mono, particularly after a fall or a hard hit to the abdomen. This can be a sign of a ruptured spleen and needs immediate care.

See a doctor soon (same-day or next available appointment) if:

  • A single node with reddish skin over it, or one that is warm and very tender to the touch, especially with a fever.
  • A node that is growing quickly or keeps getting larger over several days.
  • A fever that has lasted 4 days or more, especially with red eyes, red or cracked lips, a rash, or swollen, red hands and feet, which can be signs of Kawasaki disease.
  • A node that feels hard, rubbery, or fixed in place, especially if it does not hurt when pressed.
  • Swelling above the collarbone (supraclavicular), even if it feels small.
  • A node that is still enlarged after about four weeks, has been swollen and tender for more than five days, or keeps growing.
  • Swollen nodes in several areas of the body, or swollen nodes along with an ongoing fever above 101°F (38.3°C), unexplained weight loss, night sweats, easy bruising or bleeding, or extreme tiredness, lethargy, or loss of appetite.
  • A node near a recent cat scratch or bite that is getting bigger or more painful, or any cat scratch in a child with a weak immune system.
  • A new fever that shows up after the original illness had passed, along with a swollen node.
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Frequently Asked Questions

How big does a swollen lymph node need to be before it's abnormal?

Size alone does not decide it. The AAP puts nodes in a child's neck at around 1 centimeter and calls enlarged nodes common and expected in young children, while MedlinePlus advises contacting a provider about any node larger than 1 centimeter (0.4 inch). A node that is hard, fixed in place, growing, or still enlarged after about four weeks is a reason to call your pediatrician right away.

Is it normal for my toddler to always have swollen glands in their neck?

Small nodes are common. The AAP describes enlarged nodes from time to time as both common and expected in children, especially those younger than 5. Small, soft nodes that slide under your fingers and are not painful, in a toddler who is otherwise growing and acting well, are not a sign of a problem on their own, but mention them at checkups and call right away about one that grows, hardens, or comes with fever or weight loss.

Can teething cause swollen lymph nodes in a baby's neck?

Teething itself is not a common cause of swollen lymph nodes. A viral infection or another source of inflammation may be a more likely explanation, since teething often overlaps with colds. A soft, small node that gets smaller over the following weeks is less of a concern; call your pediatrician about a node that is growing or firm, or that comes with a fever, especially in a young baby.

How long should a swollen lymph node last before I worry?

The AAP says many swollen lymph nodes shrink within a few weeks, though some take longer. If a node stays enlarged for about four weeks, keeps growing, or is swollen and tender for more than five days, call your pediatrician rather than waiting it out. Call right away if it is hard, fixed, above the collarbone, or comes with fever, night sweats, or weight loss.

Is a swollen lymph node on one side worse than swelling on both sides?

Not necessarily. A single swollen node on one side is common with a localized infection on that side, while nodes on both sides can go along with a more general illness, like a cold or mono. Whether the node is soft and mobile or hard and fixed, and whether it is shrinking, matters more than one side versus two.

Is it safe to try to drain or pop a swollen lymph node at home?

No. A lymph node is not like a pimple, and pressing, squeezing, or trying to open one at home can push bacteria deeper into the tissue and make an infection worse. If a node has a soft, squishy center that suggests a pocket of pus, a doctor needs to evaluate it and, if needed, drain it safely in a clinical setting.

Does a swollen lymph node in the neck mean my child has cancer?

Most swollen lymph nodes in children are caused by infections such as colds, ear infections, and strep throat, and they are not cancer. The AAP describes cancer as a rare cause. A hard, fixed, painless node that keeps growing, especially with unexplained weight loss, night sweats, or persistent fatigue, is a reason to call your pediatrician right away. Your pediatrician can examine the node and tell you whether testing makes sense.

What's the difference between a swollen lymph node and a swollen tonsil?

Tonsils are the two tissue pads at the very back of the throat, and they swell when infected or irritated. Lymph nodes are separate small glands under the skin of the neck and jaw that you feel from the outside. A child can have swollen tonsils, a swollen neck node, or both, since a throat infection can also make nearby nodes react.

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