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Periapical Dental Abscess Treatment in St Leonards
By: damian@nestdental.com.auUpdated: February 25, 2026
A periapical dental abscess is a painful infection at the tip of a tooth's root, most commonly caused by deep decay, trauma, or a cracked tooth. If you're experiencing severe toothache, swelling, sensitivity, or a bad taste in your mouth, prompt treatment is important to stop the infection from spreading.
What Is a Periapical Dental Abscess?
A periapical abscess is an infection that develops at the end of a tooth root. Once infected, pressure builds at the root tip, causing pain and inflammation. Sometimes the abscess creates a draining channel (a 'gum boil'), which can reduce pain but does not remove the infection.
- Untreated decay creates a pathway for bacteria to enter the tooth
- A cracked or broken tooth exposes the inner tissues
- Previous dental work fails and bacteria reinfect the tooth
- Trauma damages the pulp and it becomes infected
Signs You May Have a Periapical Abscess
Common symptoms include:
1
Severe, throbbing toothache
Often worsens when lying down or biting.
2
Swelling of the gum or face
May appear near the tooth or spread into the cheek or jaw.
3
Temperature sensitivity
Pain with hot or cold that lingers.
4
Pain on chewing or pressure
The tooth may feel 'high' or tender.
5
Bad taste or odour
Especially if the abscess is draining.
6
Fever or feeling unwell
Possible sign the infection is spreading.
7
Swollen lymph nodes
Tender glands under the jaw or in the neck.
The Treatment Process
Our approach focuses on relieving pain, treating the infection, and preserving your tooth wherever possible.
1
Immediate Pain Relief and Infection Control
We reduce pressure and discomfort, and may prescribe medication when clinically indicated.
2
Root Canal Treatment
Often the best tooth-saving option - removing infected pulp, disinfecting the canals, and sealing to prevent reinfection.
3
Tooth Extraction (If Needed)
If the tooth is severely damaged, extraction may be recommended, followed by replacement options.
4
Follow-Up and Prevention
Abscesses can recur if underlying issues aren't addressed. We'll recommend follow-up care and preventive visits.
What You Can Do at Home Until Your Appointment
Home care can help manage symptoms temporarily, but it does not remove the source of infection.
- Rinse gently with warm salt water
- Use cold compresses on the outside of the face for swelling
- Take over-the-counter pain relief only as directed
- Avoid chewing on the affected side
- Maintain gentle brushing and flossing
Frequently asked
questions
Get Expert Treatment for Dental Abscess
Don't wait with a suspected tooth abscess. Our experienced dentists can provide prompt assessment and a personalised treatment plan.
Find Nest Dental in
St Leonards
Our St Leonards studio is conveniently located near public transport. We offer a spa-like space where you can unwind and get expert dental care.
Suite 99 (Ground Floor), 545 Pacific Highway
St Leonards NSW 2065, Australia
How to get here
Nest Dental is located in the heart of St Leonards, just moments from St Leonards Station and the new Crows Nest Metro.
St Leonards Station
T1
3 min walkCrows Nest Metro
M
1 min walkRelated treatments at Nest Dental
Other treatments and conditions our team commonly cares for alongside this one.
Emergency Dental
Same-day appointments for dental pain, trauma, or sudden problems.
Learn more about Emergency DentalTooth Extraction
Comfortable removal of damaged or unrestorable teeth, with replacement options discussed.
Learn more about Tooth ExtractionDental Imaging
On-site digital imaging including OPG, CBCT, and intra-oral X-rays for accurate diagnosis.
Learn more about Dental Imaging