A Dental Abscess Will Not Resolve on Its Own
A dental abscess is a pocket of pus caused by a bacterial infection. It can form at the tip of a tooth root (periapical abscess) or in the gum tissue beside a tooth (periodontal abscess). Both types require professional treatment. Antibiotics alone will not cure an abscess. The source of the infection must be addressed.
Left untreated, an abscess can spread to surrounding tissues, the jaw, and in rare but serious cases, other parts of the body. This is not a condition to watch and wait on.
Recognising the Symptoms
Pain
The hallmark of a dental abscess is a persistent, throbbing toothache that can radiate to the jaw, ear, or neck on the affected side. The pain may be constant rather than triggered by eating or drinking, though hot and cold sensitivity can be present as well.
Some patients describe the pain as deep and pulsing. It may worsen when lying down, which can make sleeping difficult.
Swelling
Swelling of the face, cheek, or jaw on the affected side is common. The gum around the tooth may appear red, swollen, and tender. In some cases, a visible bump (sometimes called a gum boil) forms on the gum near the tooth. This bump may rupture and drain salty, foul-tasting fluid into the mouth.
Fever and Feeling Unwell
A low-grade fever, fatigue, and a general feeling of being unwell can accompany a dental abscess. This indicates the body is fighting the infection.
Other Signs
- Sensitivity to pressure when biting or chewing.
- Swollen lymph nodes under the jaw or in the neck.
- Persistent bad breath or a bad taste in the mouth.
- Difficulty opening the mouth fully (trismus).
When to Seek Emergency Care
A dental abscess is always urgent. But some situations require immediate emergency attention.
Go to the emergency department if:
- Facial swelling is making it difficult to breathe or swallow.
- You have a high fever (above 38.5 degrees) combined with facial swelling.
- Swelling is spreading rapidly to the eye, neck, or floor of the mouth.
- You feel seriously unwell, dizzy, or confused.
These signs may indicate the infection is spreading and needs hospital-level treatment.
See a dentist urgently (same day if possible) if:
- You have a throbbing toothache with facial or gum swelling.
- A gum boil has appeared near a tooth.
- Pain is constant and not controlled by over-the-counter medication.
At Ivy Dental, emergency appointments can be booked online at any time. During opening hours, call for phone triage and booking help. Appointment timing depends on clinical urgency and clinic capacity, so same-day care is not guaranteed.
What Causes a Dental Abscess
Untreated Tooth Decay
Deep decay that penetrates through the enamel and dentine can reach the pulp (the nerve and blood vessel tissue inside the tooth). Bacteria infect the pulp, and the infection spreads to the bone at the tip of the root, forming an abscess.
This is the most common cause. Regular dental check-ups catch decay early, before it reaches this stage.
Cracked or Fractured Teeth
A crack in a tooth can provide a pathway for bacteria to reach the pulp, even if the tooth does not have visible decay. Cracks are not always obvious on visual examination, which is why dental X-rays are an important diagnostic tool.
Previous Dental Work
Teeth that have had large fillings, crowns, or other restorations can sometimes develop infections years later, particularly if the seal between the restoration and the tooth breaks down.
Gum Disease
Advanced gum disease can create deep pockets between the tooth and gum where bacteria accumulate and form a periodontal abscess.
How a Dental Abscess Is Treated
Treatment depends on the type and severity of the abscess.
Drainage
If pus has accumulated, the dentist may need to drain it by making a small incision in the gum or accessing it through the tooth. This provides immediate pressure relief and reduces pain.
Root Canal Treatment
For a periapical abscess caused by infected pulp, root canal treatment is often the recommended option. The infected pulp is removed, the canals are cleaned and disinfected, and the tooth is sealed. A crown is typically placed afterwards to protect the weakened tooth.
Root canal treatment allows the tooth to be saved. The alternative is extraction.
Extraction
If the tooth is too damaged to be restored, or if the infection is severe, extraction may be the most appropriate option. After healing, the gap can be replaced with a dental implant, bridge, or other prosthesis.
Antibiotics
Antibiotics may be prescribed if the infection has spread beyond the immediate area of the tooth, if there is facial swelling, or if the patient has a compromised immune system. Antibiotics control the spread of infection but do not eliminate the source. Definitive dental treatment is still required.
What Happens if You Ignore an Abscess
Dental abscesses do not get better without treatment. An abscess that appears to settle temporarily may be draining through a fistula (a small channel from the abscess to the gum surface). The infection remains.
Over time, untreated abscesses can cause:
- Bone loss around the affected tooth.
- Loss of the tooth if the infection destroys supporting structures.
- Spread of infection to the jaw (osteomyelitis), neck, or mediastinum. In rare cases, a dental infection can become life-threatening.
- A dental cyst forming at the tip of the root.
Early treatment is less invasive, less expensive, and less painful than treating the complications of a neglected abscess.
Preventing Dental Abscesses
Most abscesses are preventable with consistent oral care and regular dental visits.
- Brush twice daily with fluoride toothpaste.
- Floss daily to clean between teeth where decay often starts.
- Attend check-ups and cleans every six months so that decay and cracks are caught before they reach the pulp.
- Address tooth pain early. A toothache that comes and goes is a warning sign, not something to ignore.
Act on Abscess Symptoms Quickly
If you have a persistent toothache, facial swelling, or a gum boil, do not wait to see if it improves. Contact a dentist the same day.
Book an emergency dental appointment at Ivy Dental in Everton Park or Nundah at any time. We are open 7 days; during opening hours, call (07) 3266 7120 for phone triage and booking help.
