A bump on a child’s gum can be caused by something as routine as an erupting tooth, but some bumps can signal infection or another dental issue that should be checked by a pediatric dentist.
Key Takeaways
- A bluish, clear, or dark bump over an emerging tooth may be an eruption cyst, which is usually harmless and resolves as the tooth comes through.
- A red, swollen, tender bump near a tooth can sometimes be associated with a dental infection or abscess.
- Gum bumps can also result from irritation, trauma, or other oral conditions.
- Parents should not try to pop, squeeze, or drain a bump at home.
- A bump that is painful, growing, bleeding, draining pus, or not going away should be evaluated by a pediatric dentist.
- Facial swelling, fever, difficulty swallowing, or difficulty breathing requires prompt medical attention.
Common Reasons a Child May Have a Bump on the Gum
There isn’t one single explanation for a bump on a child’s gum. The location, color, size, texture, and whether the child is experiencing pain can all provide clues.
The American Academy of Pediatric Dentistry (AAPD) notes that children can develop a variety of oral lesions and conditions, including eruption cysts, gingival cysts, inflammatory lesions, trauma-related lesions, and other less common conditions. A dental examination is often needed to determine exactly what is causing a particular bump.
Here are some of the more common possibilities.
An Eruption Cyst
One of the most common explanations for a noticeable bump on a child’s gum is an eruption cyst.
An eruption cyst develops over a tooth that is preparing to break through the gum. Fluid collects between the developing tooth and the surrounding tissue, creating a small swelling.
It may look:
- Clear or translucent
- Bluish or purple
- Brownish or dark
- Similar in color to the surrounding gum
Eruption cysts are particularly common around children’s molars, although they can occur around other erupting teeth as well. The AAPD describes them as soft-tissue cysts associated with erupting teeth, and notes that they generally do not require treatment because the tooth usually erupts through the area naturally.
Parents sometimes become alarmed when they see a dark blue or purple bubble on their child’s gum. It can look concerning, but an eruption cyst is usually harmless.
What Does an Eruption Cyst Look Like?
An eruption cyst usually appears directly over or near a tooth that is about to come in. For example, you might notice a smooth, rounded bump on your child’s gum shortly before a permanent molar erupts. Your child may have no discomfort at all.
Sometimes the cyst becomes irritated from chewing. It can also bleed or become infected, although that is not the usual course.
According to Cleveland Clinic, most eruption cysts disappear without treatment as the tooth emerges.
A Dental Abscess Can Also Cause a Gum Bump
A bump on the gum can sometimes be a sign of a dental abscess. An abscess is a collection of infection associated with a tooth. In children, it can develop when bacteria reach the inside of a tooth through significant decay, trauma, or another pathway.
A gum bump associated with an infection may look different from an eruption cyst. It can appear red or swollen and may be tender. Sometimes a small pimple-like bump develops near the affected tooth and may drain fluid or pus.
Other symptoms can include:
- Toothache
- Sensitivity
- Pain when chewing
- Swelling around the tooth
- Bad taste or drainage
- Facial swelling
- Fever in more serious cases
The AAPD notes that odontogenic infections in children are generally managed by treating the source of the infection, while cases involving swelling may require drainage. Systemic symptoms such as fever or facial swelling require additional attention.
This is one reason parents should not assume that every gum bump is simply a tooth coming in.
Could It Be From Irritation or Trauma?
Children are constantly biting, chewing, bumping, and occasionally injuring their mouths. A small area of gum tissue can become swollen after an injury.
This might happen after:
- Biting the gum
- Falling or hitting the mouth
- Eating something hard or sharp
- A tooth rubbing against the gum
- Irritation from an orthodontic appliance
The AAPD includes trauma-associated lesions among the oral conditions that can occur in children and adolescents.
If the bump appeared shortly after an obvious injury and is gradually improving, it may simply be part of the healing process. However, persistent or worsening swelling deserves a dental evaluation.
What If the Bump Is Near a New Permanent Tooth?
Sometimes parents notice a bump because a permanent tooth is erupting in an unusual position.
For example, a child’s adult tooth may begin appearing behind a baby tooth rather than directly underneath it. This can make the gum look swollen or uneven.
Permanent teeth do not always emerge exactly where parents expect them to. Pediatric dentists monitor the developing dentition to make sure teeth are erupting appropriately and that there is enough space for permanent teeth.
The AAPD recommends monitoring the developing dentition for concerns such as ectopic eruption, eruption delays, crowding, crossbite, and other developing bite problems.
What If the Bump Is White?
A white bump on a child’s gum can have several possible causes. It may be associated with an erupting tooth, irritation, or another oral lesion. In infants, certain small cyst-like lesions are also relatively common.
Because the appearance alone cannot reliably identify the cause, it is better to consider the child’s age, the location of the bump, whether a tooth is coming in, and whether there are other symptoms.
The AAPD’s pediatric oral pathology guidance emphasizes that establishing a working diagnosis requires considering the child’s history along with the clinical appearance and symptoms.
Should I Pop a Bump on My Child’s Gum?
No. Parents should not pop, squeeze, or try to drain a gum bump at home.
Even if it looks like a pimple, there is no reliable way to know what is underneath it without an examination. Trying to puncture it can irritate the tissue and potentially introduce bacteria.
If the bump is an eruption cyst, it will often resolve naturally when the tooth erupts. If it is related to an infection, treating the underlying dental problem is more important than simply draining the swelling.
When Should a Child See a Pediatric Dentist?
A pediatric dentist should evaluate a gum bump if you are unsure what caused it, particularly if it does not quickly resolve.
Make an appointment if the bump:
- Is painful or tender
- Is getting larger
- Is red or significantly swollen
- Bleeds easily
- Drains pus or another fluid
- Is associated with tooth pain
- Has been present for more than a couple of weeks
- Does not appear to be related to an erupting tooth
- Keeps coming back
An eruption cyst that persists or develops pain, bleeding, or signs of infection should also be brought to the dentist’s attention.
When Is a Gum Bump a Dental Emergency?
A small gum bump without pain or other symptoms is usually not an emergency. However, facial swelling, fever, difficulty swallowing, difficulty breathing, or rapidly increasing swelling requires prompt medical attention.
These symptoms can indicate that an infection is spreading beyond the immediate area around the tooth. The AAPD specifically identifies systemic manifestations such as cellulitis, fever, and lymph node involvement as important considerations when managing pediatric dental infections.
What Will the Pediatric Dentist Do?
The dentist will examine the bump and the surrounding teeth and gums. They may ask:
- When did you first notice it?
- Has it changed in size or color?
- Does it hurt?
- Has your child had a recent dental injury?
- Is a baby or permanent tooth expected to erupt in that area?
- Has your child had tooth pain or sensitivity?
- Has there been any drainage or unusual taste?
Depending on what they find, the dentist may simply monitor the area or recommend additional treatment. An X-ray may sometimes be useful to see the tooth underneath the gum or help rule out an infection.
The AAPD recommends a thorough history and examination when evaluating unusual oral findings, with additional diagnostic procedures used when appropriate.
The Bottom Line for Parents
A bump on your child’s gum can certainly look alarming, but it does not automatically mean something is wrong. An eruption cyst is one common and usually harmless explanation, especially when a new tooth is about to come in.
At the same time, a bump can sometimes be associated with infection, trauma, or another oral condition. The appearance of the bump alone is not enough to determine its cause.
If you’re unsure, having a pediatric dentist take a look is the safest way to find out what you’re dealing with. Early evaluation can also catch dental problems before they become more painful or complicated.
Frequently Asked Questions
Is a bump on a child’s gum normal?
It can be. A bump may occur when a tooth is erupting, particularly when an eruption cyst forms over an emerging tooth. Other causes are also possible, so persistent or unusual bumps should be evaluated.
What does an eruption cyst look like?
An eruption cyst can look like a smooth, rounded, clear, blue, purple, brown, or dark bump over a tooth that is about to erupt. It is often painless and usually resolves when the tooth comes through.
Can a cavity cause a bump on the gum?
Yes. A severely infected tooth can sometimes cause localized swelling or a pimple-like bump on the gum. A dental examination is needed to determine whether the bump is related to an infected tooth.
Should I be worried about a blue bump on my child’s gum?
A blue or purple bump over an erupting tooth can be an eruption cyst, which is generally harmless. However, pain, pus, significant swelling, or other symptoms should prompt a dental evaluation.
How long does an eruption cyst last?
Many eruption cysts disappear on their own as the tooth erupts. If one persists, becomes painful, bleeds, or shows signs of infection, the child’s dentist should evaluate it.
Can I treat my child’s gum bump at home?
It is best not to pop, puncture, or squeeze it. Keep your child’s teeth and gums clean and arrange an examination if the bump is persistent, painful, growing, or otherwise concerning.
When should I call the dentist about a bump on my child’s gum?
Call the dentist if the bump is painful, growing, bleeding, draining, associated with tooth pain, or does not go away. Prompt attention is especially important if your child develops facial swelling or fever.
Can a pediatric dentist tell what a gum bump is?
Usually, the dentist can gather important information from the location, appearance, symptoms, dental history, and examination. In some cases, an X-ray or another diagnostic procedure may be needed. The AAPD emphasizes that a thorough history and clinical assessment are important when evaluating oral lesions in children.
This article is meant to provide general guidance. For specific advice on a bump on your child’s gum, we recommend you consult with Dr. Vice.
•••
At Bayshore Pediatric Dentistry & Orthodontics, we provide gentle, compassionate care in a warm and welcoming environment. Our experienced team specializes in working with children, ensuring every visit is stress-free and positive.
From first check-ups to lifelong healthy smiles, we treat every child like family. If you would like to schedule a check-up & cleaning, orthodontic consultation or anything else related to your child’s dental health, please call us today and schedule an appointment at our Citrus Park / Odessa office. We look forward to meeting you!
