Finding a lump under your jaw or on the side of your neck can be worrying, especially if you are unsure what caused it. In many cases, swollen lymph nodes are a sign that your immune system is fighting an infection, such as a common cold or sore throat. However, swelling that persists, grows, or appears without an obvious cause should not be ignored.
Understanding where swollen lymph nodes appear, what other symptoms to look for, and when to seek medical care can help you decide what to do next.
What Are Swollen Lymph Nodes?
Lymph nodes are small, bean-shaped structures that form part of your immune system. They help filter lymph fluid and support your body’s response to infections and other harmful substances.
People often call swollen lymph nodes “swollen glands.” They commonly become enlarged when immune cells respond to an infection. You may notice a tender lump under your chin, along your jawline, or on either side of your neck.
Where Can You Find Swollen Lymph Nodes?
Lymph nodes are located throughout the body, but swelling is often noticeable in areas close to the skin, including:
- Under the jaw and chin: Swelling may occur with throat, mouth, or dental infections.
- Along the neck: Commonly associated with colds, sore throats, and other respiratory infections.
- Behind the ears: May occur with nearby infections.
- In the armpits or groin: Swelling can develop in response to infections affecting nearby areas.
The location can offer clues about the cause, but it cannot confirm a diagnosis by itself.
Also Check: Tick Bite Symptoms
What Do Swollen Lymph Nodes Feel Like?
Swollen lymph nodes may feel like small lumps beneath the skin. They can be tender or painful when touched, and the surrounding area may feel uncomfortable.
Other symptoms depend on the underlying cause. You might also experience a runny nose, cough, sore throat, fever, or fatigue.
A lump that feels hard, does not move easily, grows over time, or appears without an obvious infection needs medical assessment. Tenderness alone cannot reliably distinguish a harmless cause from a more serious one.
What Causes Swollen Lymph Nodes?
The most common cause of swollen lymph nodes is an infection. Other conditions can cause swelling, although they are less common.
Common cold and viral infections
A common cold, flu, and other viral infections can trigger swelling in the neck or under the jaw as your immune system responds to the infection. The swelling often improves as you recover.
Sore throat and throat infections
A sore throat, tonsillitis, or strep throat can cause swollen glands in the neck. You may also experience pain when swallowing, fever, or redness in the throat.
Ear infections
An ear infection can cause nearby lymph nodes to become enlarged or tender. Ear pain, discharge, or changes in hearing may also occur, depending on the infection.
Tooth and gum infections
Dental infections, including an abscess, can cause swelling under the jaw or in the neck. Toothache, gum swelling, or pain when chewing may help indicate a dental problem that needs attention.
Less common causes
Less commonly, swollen lymph nodes may be associated with immune system conditions, certain medications, or infections that require specific treatment. Rarely, they can be related to cancers such as lymphoma or cancer that has spread to the lymph nodes.
Persistent or unexplained swelling should be assessed rather than attributed to an infection without medical evaluation.
Also Check: Signs of an Infected Burn
Why Is There a Swollen Lymph Node Under My Jaw on One Side?
A swollen lymph node under the jaw on one side may develop when your body responds to an infection affecting a nearby area. Possible causes include a sore throat, an ear infection, or a tooth or gum infection.
You might notice tenderness when chewing, swallowing, or touching the affected area. However, not every lump near the jaw is a lymph node. Salivary gland problems, dental conditions, and other causes of swelling can feel similar.
If the lump is getting bigger, has no clear explanation, or does not improve, arrange a medical assessment.
How Long Do Swollen Lymph Nodes Last?
Swollen lymph nodes caused by common infections often begin to settle as the infection improves. Some may take longer to return to their usual size, even after other symptoms have disappeared.
The duration depends on the underlying cause, so there is no single timeline that applies to everyone.
Arrange an appointment if the swelling continues to grow, has not started improving within about a week, or remains present for two weeks or longer. Seek assessment sooner if the lump feels hard or fixed, or you develop other concerning symptoms.
When Should You Worry About Swollen Lymph Nodes?
Most swollen lymph nodes are related to infections, but certain symptoms warrant medical attention.
Contact a healthcare professional if your lymph nodes:
- Continue to enlarge or remain swollen without an obvious cause.
- Feel hard, rubbery, or fixed in place.
- Occur alongside unexplained weight loss, night sweats, or persistent fever.
- Appear in several unrelated areas of the body.
- Are located near or above the collarbone.
These signs do not automatically mean you have a serious condition, but they should be evaluated.
Seek emergency medical care immediately if you have difficulty breathing or swallowing.
How Are Swollen Lymph Nodes Treated?
Treatment depends on what is causing the swelling. If a viral infection is responsible, rest, fluids, and time may be enough. A bacterial infection may require specific treatment, depending on the diagnosis.
A healthcare professional may ask when the swelling started, whether it is changing, and whether you have other symptoms. They may examine the affected area and, if needed, recommend blood tests, imaging, or further investigation.
Antibiotics do not treat viral infections, and they should not be taken unless prescribed for an appropriate indication. Avoid repeatedly squeezing or pressing a swollen lump, as this can irritate the area.
What Doctor Should You See for Swollen Lymph Nodes?
A primary care professional is a reasonable starting point for swollen lymph nodes that are not causing an emergency. They can assess your symptoms, look for a possible infection, and determine whether testing or specialist evaluation is needed.
If you have a concerning symptom that needs prompt assessment, seek timely medical care. Do not delay emergency treatment for breathing or swallowing difficulties.
If you need an evaluation, you can learn more about Carestier Healthcare and its healthcare services in Monroe, New York.
Medical disclaimer: This article provides general health information and is not a substitute for an individual medical assessment. A healthcare professional can evaluate your symptoms and recommend appropriate care.
FAQs About Swollen Lymph Nodes
Yes. A cold can cause lymph nodes in the neck or under the jaw to swell as your immune system responds to the infection. The swelling generally improves as you recover.
A nearby infection, such as a sore throat, ear infection, or dental problem, may cause one-sided swelling. Other conditions can also cause lumps in this area, so persistent or worsening swelling should be assessed.
They can. Tenderness or pain is common when lymph nodes swell in response to an infection, but painless swelling can also occur. Pain alone does not establish the cause.
Arrange an assessment if the swelling grows, has no obvious cause, feels hard or fixed, or persists without improvement. Seek emergency care for difficulty breathing or swallowing.
Yes. Swelling caused by many common infections settles as the body recovers. However, persistent, worsening, or unexplained swelling should not be left unchecked.