A bump beneath your jawline may be an enlarged lymph node, but it could also indicate another medical issue that requires evaluation, such as a growth or a cyst.
A soft lump along the jaw that you can shift with your fingers is often not serious and frequently resolves without treatment.
Nevertheless, there are several possible reasons for a mobile lump on your jawbone that merit seeing a healthcare professional.
This piece outlines seven of the most frequent causes of this sign.
What clues should I watch for?
You might get a sense of what’s producing the lump on your jawbone by noting other symptoms that occur with it.
The lump’s position, whether it hurts, and any underlying risk factors you have for other illnesses can help determine the cause and whether you should seek medical care.
1. Enlarged lymph node
Lymph nodes sit just under the skin, including several on each side of the neck along the jawline.
These glands store white blood cells, and when you’re battling an infection they can swell as your immune system ramps up.
You may observe swelling as a movable bump on one or both sides of your jaw. These lumps are often soft but can be tender when pressed.
Associated signs such as chills, fever, or nasal discharge may also point to an inflamed lymph node.
2. Allergic reactions
Contact with allergens or an allergic response can lead to swelling of lymph nodes and other facial tissues, including areas near the jawline.
If you have seasonal or environmental allergy symptoms in addition to a movable lump on your jawbone, allergies may be responsible.
Food or medication allergies can likewise cause the sinuses and glands around the jaw to swell. Allergy-related lumps on the jaw may feel swollen, irritated, or painful.
3. Fibroma
Fibromas are benign soft-tissue tumors. They can occur anywhere on the body and consist of the body’s own tissue, so they are not cancerous.
An ossifying fibroma is a noncancerous tumor made up of tissue and bone. These develop from the section of the jaw where the teeth form.
Ossifying fibromas may lead to visible swelling and a soft lump on one side of the jawbone.
4. Lipoma
A lipoma is a noncancerous mass formed by a deposit of fat beneath the skin. These lumps commonly appear on the neck or along the jaw.
Lipomas are soft, skin-colored, and typically painless. They tend to grow slowly and generally don’t present a health threat.
Individuals between about 40 and 60 years old, and those with Cowden syndrome, have a higher likelihood of developing lipomas.
5. Cyst
A cyst is a sac-like structure filled with fluid or semi-solid material.
Soft, movable cysts can form along the jawline. Usually they don’t cause other symptoms, though they can become inflamed and uncomfortable.
A dentigerous cyst specifically arises from the jawbone and contains cells associated with tooth development.
6. Tooth abscess
An abscessed tooth is a bacterial infection that can develop in various parts of the mouth.
As your body combats the infection, it may put pressure on the lymphatic system and cause swollen lymph nodes on one or both sides of the jaw.
An abscessed tooth typically causes pain that can radiate into the neck and jaw, and requires prompt dental treatment.
7. Cancer
Certain cancers can present as malignant tumors on the jaw.
Most of these tumors are not soft and movable, although some cancers (for example, liposarcoma) can produce masses that feel soft and shiftable.
Malignant lumps are often not tender when touched.
When should I contact a doctor?
A movable lump on the jaw is most commonly related to allergies or infection and often does not need urgent medical care.
However, contact your healthcare provider if you experience any of the following:
- difficulty eating or swallowing
- reduced jaw mobility
- hard, painless bumps on the jaw
- fever higher than 103°F (39°C)
- pain that lasts or worsens over several days
How is a movable jaw lump diagnosed?
If a lump on your jaw doesn’t resolve, a clinician may order tests to identify the cause. After ruling out allergies and swollen lymph nodes, further diagnostics may be indicated.
A physician may suggest a biopsy of the lump. In a biopsy, a small tissue sample is taken from the mass and examined for cancerous cells.
If results are inconclusive for cancer, additional imaging such as a CT scan or MRI may be recommended.
Sometimes routine dental X-rays reveal the reason for a jaw lump, particularly when related to wisdom teeth or a tooth abscess.
How is a movable lump on the jaw treated?
If a bacterial infection is behind the lump on your jaw, your provider may prescribe antibiotics.
Allergy-related swelling causing a jaw lump may respond to over-the-counter antihistamines or prescription allergy medications like cetirizine or fexofenadine.
When a lump is a benign growth, choosing to remove it can be your decision. If it’s cosmetically bothersome or interferes with daily life, you and your physician can plan removal.
In many situations, a jaw lump can be left alone without posing health risks.
Is surgery needed for a movable jaw lump?
Sometimes surgical removal is appropriate for a lump on the jawbone.
If the lump is a lipoma or cyst, you may elect removal for aesthetic reasons; this choice depends on your preferences.
In other cases, a doctor might remove a lump if there’s concern it could become malignant or impede jaw function.
An infected, abscessed tooth may require dental surgery to relieve symptoms.
A painful or troublesome cyst can often be excised using minimally invasive techniques.
The bottom line
The most frequent causes of a movable lump beneath the jaw—such as swollen lymph nodes or fibromas—usually improve on their own.
If you notice additional symptoms or the lump causes pain or discomfort, seek evaluation from a medical professional. They can identify the cause and recommend proper treatment. For related jaw issues, you may also find helpful information on ear and jaw pain.
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