What Happens If I Ignore a Dental Abscess?

Quick answer: an untreated dental abscess keeps getting worse. The infection spreads into the surrounding bone and gum tissue, then into the face and neck, and in rare cases into the airway or bloodstream. It will not heal without professional treatment: drainage, a root canal, or an extraction (Lockhart et al., 2019). If you are not sure what you are looking at, how to identify an oral abscess covers the warning signs.

How an ignored abscess progresses#

Local spread#

The pus erodes outward under pressure. It spreads into the jawbone and gum tissue around the tooth, and it sometimes punches a small draining pimple on the gum, called a fistula, that leaks pus into the mouth. The infection can destroy bone around the root in the process (Neal & Schlieve, 2022).

Facial swelling#

Past the tooth, the infection causes visible swelling of the face, cheek, or jaw, and the swelling can grow large and tight when treatment is delayed. Mandibular molar abscesses, in the lower back teeth, are the ones most prone to track into the deeper spaces of the neck, so swelling in the lower jaw deserves same-day attention (Bridwell et al., 2021; Zawiślak & Nowak, 2021).

Ludwig's angina#

In rare cases the infection spreads into the floor of the mouth and the neck spaces, a condition called Ludwig's angina. About 70% of Ludwig's angina cases start from a dental infection, most often an infected lower molar. The swelling can push the tongue up and back and obstruct the airway, and that is a life-threatening emergency requiring hospital care, airway protection, intravenous antibiotics, and surgical drainage (Bridwell et al., 2021).

Sepsis#

In rare cases the infection enters the bloodstream and causes sepsis, a body-wide, life-threatening response that needs emergency medical treatment. Spread can also reach the chest, the spaces around the heart and lungs, the eye socket, or the brain, though each of these is uncommon (Neal & Schlieve, 2022).

Why it won't resolve on its own#

Pain sometimes eases when the abscess drains through a fistula or the nerve inside the tooth dies. The infection is still there: bacteria remain in the dead pulp and bone and keep causing damage while the tooth sits quiet. Eliminating them takes mechanical removal of the infected tissue, disinfection of the canal system, and a sealing restoration, or removal of the whole tooth (Lockhart et al., 2019). See a dentist at the first sign of trouble: emergency dental care guidance applies the moment swelling or spreading pain appears.

What treatment involves#

• Draining the abscess through the gum or the tooth
• A root canal to remove the infected pulp and save the tooth, when possible
• Extraction if the tooth cannot be saved
• Antibiotics when the infection has spread beyond the tooth itself, for example with fever, malaise, or swelling into the neck (Lockhart et al., 2019)

That last point surprises people: an antibiotic cannot reach the bacteria inside an abscess pocket or a dead pulp well enough to cure it. The ADA guideline panel found antibiotics provide negligible benefit when the tooth itself can be treated, and recommended prioritizing the dental treatment in every case, with antibiotics reserved for systemic involvement (Lockhart et al., 2019).

Frequently asked follow-ups#

Can antibiotics alone cure a dental abscess?#

No. Antibiotics can hold down a spreading infection for a while, but the infected tooth or the pus collection still needs drainage or treatment for a lasting fix. The ADA recommends against antibiotics as a substitute for dental treatment (Lockhart et al., 2019). The current antibiotic prescribing guidelines walk through when they are indicated.

How urgent is it to treat a dental abscess?#

Treat it within a day or two. Do not wait for pain to worsen or swelling to spread: the hospital cases in these reviews started as treatable tooth infections (Bridwell et al., 2021; Zawiślak & Nowak, 2021).

What symptoms mean I should seek emergency care right away?#

Fast-spreading facial or neck swelling, trouble breathing or swallowing, a high fever, or feeling worse by the hour: any of these alongside an abscess means emergency care now (Bridwell et al., 2021; Lockhart et al., 2019).

Key takeaways#

• A dental abscess is a serious infection that will not go away on its own and needs professional treatment: drainage, root canal therapy, or extraction.
• If you ignore the abscess, the infection can spread to the jawbone, face, and neck spaces, and in severe cases the airway or bloodstream.
• Antibiotics are not a cure; the infected tooth or the pus must still be treated or removed, with antibiotics reserved for spreading or systemic infection.
• Fast-spreading swelling, trouble breathing or swallowing, or high fever means emergency care now.

If you're experiencing a medical emergency, seek emergency care immediately.