What Is a Dental Abscess in Children?
A dental abscess is a localized collection of pus that forms as the body tries to fight a bacterial infection in or around a tooth. In children, the infection most often starts with a cavity that is left untreated. As the decay progresses through the enamel and into the dentin (the softer layer beneath), bacteria eventually reach the pulp, the innermost part of the tooth that contains nerves and blood vessels. Once the pulp becomes infected, the infection can spread through the tip of the root and into the surrounding bone and gum tissue.
There are two main types of dental abscesses in children. A periapical abscess forms at the tip of the tooth root, typically caused by deep decay or trauma that allows bacteria into the pulp. A periodontal abscess forms in the gum tissue alongside the tooth root, usually related to gum disease or a foreign object (such as a popcorn kernel) trapped between the tooth and gum. Periapical abscesses from untreated cavities are far more common in children.
Why Prompt Treatment Is Critical
A dental abscess will not resolve on its own. Antibiotics alone cannot cure an abscess; the source of the infection must be treated. If left untreated, the infection can spread from the tooth to the jawbone, facial tissues, and fascial spaces (the tissue planes of the head and neck). In rare but serious cases, a dental infection can lead to Ludwig's angina (a floor-of-mouth infection that can obstruct the airway), orbital cellulitis (infection near the eye), or sepsis (a life-threatening bodywide infection). Children are particularly vulnerable because their developing immune systems may not contain the infection as effectively as an adult's.
What Causes a Dental Abscess in Children?
The overwhelming majority of dental abscesses in children are caused by untreated tooth decay. However, other factors can also lead to infection.
Untreated Cavities
Tooth decay is the most common chronic childhood disease, according to the CDC. When a cavity forms, bacteria begin to break down the tooth structure. If the cavity is not treated with a filling, the decay deepens through the enamel and dentin until it reaches the pulp. Once bacteria enter the pulp, infection develops rapidly. The infection spreads through the root canals to the tip of the root, where it creates an abscess in the surrounding bone.
Dental Trauma
A cracked, chipped, or knocked-out tooth can expose the pulp to bacteria. Even if the damage appears minor, a fracture that extends to the pulp can lead to infection weeks or months after the injury. Children who experience dental trauma should be evaluated promptly, even if the tooth looks intact from the outside.
Other Contributing Factors
Previous dental work that develops a gap or fails over time can allow bacteria to reenter the tooth. Poor oral hygiene increases the overall bacterial load in the mouth and accelerates decay. A diet high in sugary foods and drinks provides fuel for cavity-causing bacteria. Children with weakened immune systems (from medical conditions or medications) may be more susceptible to infection.
Signs and Symptoms of a Dental Abscess in Children
Some children with a dental abscess have obvious symptoms, while others may not complain until the infection is advanced. Knowing the warning signs helps parents seek care early.
Common Warning Signs
The most common sign is a persistent, throbbing toothache that does not go away. The pain may worsen when lying down, chewing, or consuming hot foods. Other signs include swelling of the gum near the affected tooth (which may appear as a red or white bump on the gum), swelling of the face, cheek, or jaw on the affected side, fever, a bad taste in the mouth (from pus draining from the abscess), bad breath, and sensitivity to hot and cold temperatures.
Signs in Younger Children Who Cannot Describe Pain
Toddlers and preschoolers may not be able to tell you their tooth hurts. Watch for refusal to eat or drink (especially hot or cold items), increased fussiness or crying, pulling at the ear or cheek on one side, disrupted sleep, drooling more than usual, and visible swelling on the face or a pimple-like bump on the gum (called a fistula or gum boil). A gum boil is a sign that the abscess is draining, which may temporarily relieve pressure and pain but does not mean the infection is gone.
When to Go to the Emergency Room
Seek emergency medical care if your child has facial swelling that is spreading (particularly around the eye or under the jaw), difficulty swallowing or breathing, a fever over 101 degrees Fahrenheit (38.3 degrees Celsius) that does not respond to fever reducers, confusion or excessive drowsiness, or a stiff neck. These signs may indicate that the infection is spreading beyond the tooth and requires urgent hospital-based treatment.
Treatment and Recovery for Pediatric Dental Abscess
Treatment of a dental abscess has two goals: eliminate the infection and address the underlying cause (the damaged or decayed tooth). The specific approach depends on whether the affected tooth is a baby tooth or permanent tooth, the severity of the infection, and the child's age.
Draining the Abscess and Antibiotics
The first step is to drain the abscess and remove the source of infection. If there is significant facial swelling, the dentist may prescribe antibiotics (typically amoxicillin for children) to help control the infection before performing definitive treatment. Antibiotics alone do not cure a dental abscess. They reduce the bacterial load and swelling so the dentist can safely treat the tooth. The abscess may be drained through an incision in the gum, through the tooth during a pulpotomy or root canal, or through extraction of the tooth.
Treatment for Baby Teeth
When a baby tooth has an abscess, the two main options are a pulpotomy (removing the infected portion of the pulp) followed by a stainless steel crown, or extraction of the tooth. If the baby tooth is close to its natural shedding time, extraction is often the simplest approach. If the tooth is not due to fall out for several years, the dentist may attempt to save it with a pulpotomy to maintain spacing for the permanent tooth. A space maintainer may be placed if a baby tooth is extracted early.
Treatment for Permanent Teeth
When a permanent tooth has an abscess, the goal is to save the tooth whenever possible. Root canal therapy removes the infected pulp, cleans the root canals, and seals the tooth. A crown is then placed to protect the weakened tooth. If the tooth is too damaged to save, extraction may be necessary, followed by discussion of replacement options as the child grows. In children with immature permanent teeth (open root tips), a procedure called apexification or revascularization may be used to encourage continued root development.
Recovery and Aftercare
After treatment, pain and swelling typically begin to improve within 24 to 48 hours. Complete the full course of antibiotics if prescribed, even if your child feels better. Give children's acetaminophen or ibuprofen as directed for pain management. Offer soft, cool foods for the first 2 to 3 days. Avoid hot foods and drinks until numbness wears off.
Schedule a follow-up visit as directed by the dentist, typically 1 to 2 weeks after treatment, to confirm the infection has resolved. Continue regular brushing (gently around the treated area) and flossing to prevent future infections.
Cost of Treating a Dental Abscess in Children
Treatment costs depend on the severity of the infection, the procedure needed, and whether sedation is required. Below are typical cost ranges as of 2024. Actual costs vary by provider and location.
An emergency dental exam costs approximately $75 to $200. Dental X-rays range from $25 to $150. Antibiotics (generic amoxicillin) typically cost $5 to $25 with insurance or a pharmacy discount. A pulpotomy with a stainless steel crown on a baby tooth ranges from $300 to $600. A baby tooth extraction costs $75 to $300. Root canal therapy on a permanent tooth ranges from $500 to $1,200 (plus the cost of a crown). Sedation or general anesthesia, if needed, adds $200 to $800 or more.
Insurance Coverage
Most dental insurance plans cover emergency exams, X-rays, antibiotics, extractions, and pulp therapy for children. Coverage levels and copays vary by plan. Medicaid and CHIP cover medically necessary dental treatments, including abscess treatment, for eligible children. If your child needs treatment under general anesthesia (common for very young children or complex cases), medical insurance may cover the anesthesia portion. Ask the dental office about coverage and payment options before treatment when the situation is not an emergency.
When to See a Pediatric Dentist About a Possible Abscess
Contact a pediatric dentist promptly if your child complains of a persistent toothache lasting more than one to two days, if you see swelling on the gum or face, or if you notice a bump on the gum near a tooth (gum boil). A toothache that suddenly stops hurting does not mean the problem is gone. The nerve may have died, but the infection remains and will continue to spread.
Schedule an urgent appointment if your child has a visible cavity that appears dark or deep, facial swelling on one side, or a fever combined with tooth pain. If emergency signs are present (difficulty breathing or swallowing, spreading facial swelling, high fever), go directly to the emergency room.
Prevention is the best strategy. The American Academy of Pediatric Dentistry recommends dental visits starting by age one and every six months thereafter. Routine exams catch cavities early, before they progress to the point of causing an abscess.
Finding a Pediatric Dentist for Abscess Treatment
A board-certified pediatric dentist has specialized training in treating dental infections in children, including pulp therapy, extractions, and managing dental emergencies. Pediatric dental offices are equipped to handle anxious or uncooperative children and offer sedation options when needed.
When choosing a provider for urgent care, look for a pediatric dental office that offers same-day or next-day emergency appointments. Ask whether they have the capability to perform pulpotomies and extractions in-office and what sedation options are available. For complex infections or cases requiring general anesthesia, the pediatric dentist may coordinate with a hospital-based dental program or a pediatric oral surgeon.
Search Pediatric Dentists in Your Area