A swelling on the gum can have several causes. Sometimes it’s caused by mild irritation, but it can also be a sign of an infection that requires treatment. Don’t try to determine the cause on your own based solely on its appearance. If the swelling is painful, getting bigger, has pus, or is accompanied by a fever or swelling of the cheek, see a dentist as soon as possible.
In a nutshell
- A swelling on the gum should not be ignored if it persists.
- It may be caused by an infection, a gum problem, or a local injury.
- Don't break it or puncture it at home.
- Schedule an appointment if it doesn't go away quickly or if it comes back.
- Seek immediate medical attention if you have a fever, a swollen cheek, or difficulty swallowing or breathing.
What does a swelling on the gum look like?
It may be a small lump, a red, swollen area, or a whitish spot. Sometimes it’s hard, other times it’s soft. It may hurt when touched, or it may not hurt at all. Appearance alone doesn’t always indicate how serious the problem is.
Some people notice the swelling when they brush their teeth. Others feel it with their tongue or notice it after an unpleasant taste develops in their mouth. It’s helpful to keep an eye on whether the area gets bigger, if pus forms, and if you have pain in the nearby tooth.
A tooth infection
A common cause is an infection that originates inside a tooth. This can occur after a deep cavity, a crack, an old filling, or a blow to the tooth. The infection can spread to the root area, and the body tries to drain the pus through the gum.
In this situation, the swelling may look like a small pimple. Sometimes it bursts on its own, and a foul-tasting fluid oozes out. Even if the pressure subsides and the pain lessens, the infection has not been cured. The tooth must be examined and treated.
A gum problem
Dental plaque and tartar can cause gum inflammation. The area may become red, tender, and swollen. Sometimes the swelling occurs between two teeth, especially if food particles frequently get trapped there.
If your gums bleed frequently, you have bad breath, or you feel that your teeth are loose, the problem may be more serious and require a thorough examination.
A food residue blockage
A piece of popcorn shell, a food particle, or a strand of meat can get stuck between a tooth and the gum. The area may become irritated and swollen. Gentle flossing can help if the problem is superficial.
Do not use needles, sharp toothpicks, or other objects. You could injure your gums and push the debris deeper.
A wound or local irritation
Your gums may swell after biting into a hard food, brushing too aggressively, or being scraped by the edge of a tooth or a dental restoration. Usually, mild irritation begins to subside within a few days.
If it doesn't heal, gets bigger, or reappears in the same spot, you should see a doctor.
A tooth trying to come in
In the area of the wisdom teeth, the gum may swell when the tooth has only partially erupted. Bacteria and food particles can become trapped under the flap of gum. This can cause pain, an unpleasant taste, difficulty opening the mouth, and swelling of the cheek.
This problem shouldn't be treated with pain relievers alone. The doctor needs to check the position of the tooth and the condition of the area.
Could it be something serious if it doesn't hurt?
Yes. The absence of pain does not automatically mean that the area is healthy. Some infections can spread through the gums and cause very little discomfort. Other swellings may have causes unrelated to a tooth.
If a lump persists for more than about two weeks, grows, or returns, it should be evaluated even if it doesn't hurt.
What can you do until you see the dentist?
Keep the area clean. Gently brush your teeth and floss without putting pressure on the swollen area. You can rinse your mouth with lukewarm water. Eat on the opposite side if the area is sensitive.
For pain, you can use a pain reliever that you normally take and that is right for you, following the package insert and the recommendations of your doctor or pharmacist. Do not combine medications randomly, and do not exceed the recommended dose.
What shouldn't you do?
Do not burst, squeeze, or puncture the bump. You could push the bacteria deeper, cause bleeding, and delay proper treatment.
Do not apply aspirin, alcohol, garlic, or caustic substances directly to your gums. These can burn the tissue. Do not take antibiotics left over from a previous treatment. Antibiotics are not suitable for every type of swelling, and often do not address the underlying dental cause.
How does the doctor determine the cause?
The dentist examines the gums and the surrounding teeth. He or she may check to see if a tooth is sensitive to touch, cold, or pressure. Sometimes an X-ray is needed to see the root and the surrounding bone.
Once the cause has been identified, treatment may involve cleaning the area, treating the gums, performing a root canal, draining an infection, or, in some cases, extracting a tooth that can no longer be saved.
When is a quick consultation needed?
Make an appointment as soon as possible if the swelling:
- it is painful;
- has pus;
- increases;
- returns to the same place;
- it is next to a broken or severely decayed tooth;
- is accompanied by pain when chewing;
- It doesn't go away in a few days.
When is it an emergency?
Seek immediate medical attention if the swelling spreads to your cheek, eye, or throat; if you have a fever and feel very ill; if you cannot open your mouth properly; or if you have difficulty swallowing or breathing. Difficulty breathing is a major emergency and requires calling 112.
What Information to Note Before Your Appointment
Take a photo of the area just to track any changes, not to replace a doctor’s visit. Make a note of when you first noticed the swelling, whether it has gotten bigger, whether it has burst, and which tooth appears to be nearby. Tell your dentist if you’ve recently had a filling, an injury, a tooth extraction, or a root canal in that area.
Please let us know if you have diabetes, a weakened immune system, are pregnant, or are undergoing treatments that may affect your recovery. These details can affect how quickly the issue needs to be addressed.
Why It's Worth Seeing a Doctor Even If the Swelling Is Minor
A minor problem may be easier to treat and may require a simpler procedure. If you wait until you experience severe pain or your cheek swells, treatment may become more difficult. An early evaluation allows the dentist to determine whether the tooth can be saved and to stop the infection from spreading.
Don't try to compare the swelling to photos on the internet. Different injuries can look similar, and the diagnosis depends on a clinical examination and, sometimes, an X-ray.
Conclusion
A lump on the gum may be a simple irritation, but it could also be a sign of an infection. It’s safest not to pop it and not to wait until it becomes painful. A timely checkup can stop the problem before it spreads and increase the chance of saving the tooth.
Frequently Asked Questions
Can a lump on the gum go away on its own?
Mild irritation may subside, but a dental infection won't go away on its own. If the swelling persists or returns, see your dentist.
If the bump has burst and no longer hurts, does it still need to be treated?
Yes. The reduction in pain may simply mean that the pressure has been relieved. The underlying cause may still be present.
Can I put ice on my cheek?
A cold compress applied to the outside of the cheek can temporarily relieve discomfort. Do not apply ice directly to the gums.
Does salt water cure infections?
It can help keep the area clean and provide mild relief, but it is not a substitute for treatment.
Is an antibiotic always necessary?
No. The dentist decides whether it is necessary. Many dental problems require, first and foremost, treatment of the underlying cause.
Could the swelling be caused by a wisdom tooth?
Yes, especially if the tooth has only partially erupted and the area is hard to clean.
Could it be a canker sore?
A canker sore usually looks like a small, whitish, painful sore, not like a pus-filled lump. Your doctor can tell the difference.
Can I go to the dentist if the area is swollen?
Yes. That is precisely when the assessment is important.
How long can I wait?
If you experience pain, pus, or a lump, don't wait. If the lump is small but doesn't go away, schedule an appointment.
What happens if I ignore it?
An infection can spread, affect the bone, and reduce the chances of saving the tooth.