Also known as: dental infection, tooth infection, gum boil, pus pocket on the gums, infected tooth swelling, abscessed tooth

Dental abscess in children is a pocket of infection that forms around a tooth or in the surrounding gum tissue. It can cause throbbing tooth pain, swelling, tenderness, a bump on the gums, a bad taste in the mouth, or discomfort when chewing. Some children may also seem extra tired, develop a fever, or avoid eating on the affected side because the area feels too sore.

This symptom is often a sign of a deeper infection caused by untreated decay, injury, or bacteria entering the inner parts of the tooth. Unlike minor irritation, a dental abscess usually does not go away on its own and can worsen quickly if left untreated. The infection may spread into nearby tissues, increase swelling, and make it harder for your child to eat, sleep, or feel comfortable. Early evaluation helps relieve pain, control the infection, and protect the affected tooth whenever possible.

Possible Causes of a Dental Abscess

Dental abscess is commonly associated with:

  • Deep tooth decay – When a cavity is left untreated, bacteria can travel into the inner pulp of the tooth and eventually create an infection near the root.

  • Cracked, chipped, or broken tooth – Damage to the tooth can create an opening for bacteria, allowing infection to develop inside the tooth or surrounding tissues.

  • Untreated pulp infection – When inflammation or infection inside the tooth worsens over time, pressure and pus can build up, leading to an abscess.

  • Gum infection around the tooth – Bacteria trapped near the gums can sometimes form a localized pocket of infection, especially when swelling, debris, or irritation are already present.

Treatments for a Dental Abscess

Depending on the cause of dental abscess, treatment may include:

  • Emergency Dentistry – A dental abscess needs prompt evaluation to identify the source of infection, relieve pressure, and prevent the problem from getting worse. Emergency care helps your child get comfortable faster and guides the next steps in treatment.
  • Baby Root Canals (Pulpotomy, aka Pulp Therapy) – If the infection is inside a baby tooth, pulp therapy may remove the infected tissue while preserving the outer tooth structure. This can relieve pain, control infection, and help keep the tooth in place until it is ready to fall out naturally.
  • Crowns – After a badly damaged or treated tooth is stabilized, a crown can protect it from further breakdown and restore strength and function. This is often recommended when a tooth has significant decay or structural damage along with infection.

When to See a Dentist

Consider scheduling an appointment if your child:

  • Has swelling in the gums, face, or jaw
  • Complains of throbbing tooth pain or severe tenderness
  • Has a bump on the gums, drainage, or a bad taste in the mouth
  • Has fever, trouble eating, or trouble sleeping because of the pain

Related Symptoms

Concerned About a Dental Abscess?

Dental abscess is often a sign that an infection needs prompt attention. We’d love to evaluate your child’s symptoms and make their visit comfortable, positive, and stress-free. Schedule an appointment today and get the answers you need.