Short answer: A dental abscess is a collection of pus caused by a bacterial infection at the tip of a tooth root or in the gums. Throbbing pain, swelling, tenderness when biting and a bad taste in the mouth are typical symptoms. Treatment drains the pus and removes the source of infection through root canal treatment, gum treatment or extraction. Antibiotics alone are not enough; spreading swelling requires urgent care.
A throbbing toothache, a swelling in your cheek or gums that keeps getting bigger and a bad taste in your mouth... These symptoms often point to a dental abscess. A dental abscess is an infection around a tooth or the gums, caused by bacteria and accompanied by a build-up of pus. It does not go away on its own and, if left untreated, can spread to the surrounding tissues. In this article we explain the types of abscess, its symptoms, the treatment options, what can happen if it is not treated and how it can be prevented.
What is a dental abscess?
A dental abscess is a small pus-filled pocket that forms at the tip of a tooth root or in the gums as a result of a bacterial infection. While fighting the infection, the body collects bacteria and dead cells in one area; over time this build-up creates pressure that causes pain and swelling.
The main conditions that cause an abscess are:
- Deep, untreated cavities reaching the tooth's nerve (the pulp)
- A tooth losing its vitality after trauma
- Bacteria seeping in through cracked or broken teeth
- Deepening pockets between the tooth and gum in advanced gum disease
- Inflammation of the gum over partially erupted wisdom teeth
An abscess is the body's attempt to contain the infection; however, the problem is not resolved unless the pus is drained and the source of infection is removed.
Types: periapical and periodontal abscess
Dental abscesses fall into two main groups depending on where the infection starts: a periapical abscess develops at the tip of the tooth root, while a periodontal abscess develops in the gums and the supporting tissues around the tooth. This distinction matters because the treatment approach depends on the source of the infection.
Periapical abscess
A periapical abscess is the most common type of abscess. After decay or trauma, the tooth's nerve becomes inflamed and eventually dies. Bacteria travel down the root canal and accumulate in the bone at the tip of the root. With this type of abscess, the pain is usually clearly felt in a single tooth; touching the tooth or biting makes the pain worse. The tooth's sensitivity to hot or cold may decrease once the nerve has died.
Periodontal abscess
A periodontal abscess forms when bacteria and food debris get trapped in pockets that have deepened because of gum disease. The tooth may still be vital. The swelling is usually in the part of the gum close to the tooth, and the tooth may feel loose. It tends to recur in people with gum disease.
In addition, a pericoronal abscess that develops around partially erupted wisdom teeth is also a common finding.
Symptoms
The most typical symptom of a dental abscess is throbbing pain that often gets progressively worse; it may be accompanied by swelling, tenderness when biting and a bad taste in the mouth. Symptoms vary depending on the type and stage of the abscess:
- Throbbing pain that sometimes radiates to the ear, jaw or neck
- Pain that increases when chewing or touching the tooth
- Swelling in the gums, cheek or under the jaw
- A pimple-like bump on the gum (fistula) that occasionally drains
- A bad taste in the mouth and bad breath
- Swollen, tender lymph nodes under the jaw or in the neck
- Fever, fatigue and a general feeling of being unwell
When the abscess drains on its own through a fistula, the pain may suddenly ease. This does not mean the infection has gone; it only shows that the pressure has dropped. Unless the source of infection is treated, the abscess may come back.
Emergency warning signs: If the swelling is growing quickly or spreading to the area around the eye or to the neck, or if there is difficulty swallowing or breathing, marked difficulty opening the mouth or a high fever, see a dentist or go to the nearest emergency department without delay.
Dental abscess treatment: drainage, root canal, extraction, antibiotics
Dental abscess treatment has two basic goals: to drain the accumulated pus and to remove the source of the infection. Which method is used is decided by the dentist based on the type of abscess, whether the tooth can be saved and how far the infection has spread.
- Drainage: The pus in the abscess area is drained through a small incision in the gum or through an opening made in the tooth. This relieves the pressure and helps the pain ease quickly.
- Root canal treatment: In periapical abscesses, if the tooth can be preserved, the inflamed or dead nerve tissue is cleaned out and the root canals are disinfected and filled. The tooth can then be strengthened with a filling or a crown.
- Gum treatment: In periodontal abscesses, the pocket is cleaned, the root surfaces are smoothed and the underlying gum disease is treated.
- Tooth extraction: If the tooth is severely damaged or cannot be saved, it is extracted and the abscess is drained. Options such as an implant or a bridge can later be considered to replace the extracted tooth.
- Antibiotics: If the infection has spread to the surrounding tissues, if there is fever or widespread swelling, or in people with a weakened immune system, the dentist may recommend antibiotics. Antibiotics alone do not treat an abscess; the source of infection must be removed by drainage, root canal treatment or extraction. Antibiotics should only be used with a prescription and for the recommended duration.
Until your treatment, you can take the painkiller recommended by your dentist and gently rinse your mouth with warm salt water to ease the pain. It is advisable to avoid applying heat to the outside of the face and placing tablets directly on the gum; medication can burn the gum tissue.
What happens if it is not treated?
An untreated dental abscess does not heal on its own, and the infection can spread to the jawbone, the soft tissues of the face and, rarely, to other parts of the body. Possible consequences include:
- Tooth loss: As the damage to the bone and supporting tissues progresses, the chance of saving the tooth decreases.
- Widespread infection of the face and neck (cellulitis): The swelling can spread to the cheek, the area around the eye or under the jaw.
- Sinus involvement: Infections originating from the upper molars can progress into the maxillary sinus.
- Bone infection: The infection can affect larger parts of the jawbone.
- Serious and urgent conditions: Although rare, potentially life-threatening situations can develop, such as the infection spreading to the neck and narrowing the airway or entering the bloodstream.
Easing pain or drainage from a fistula does not mean that the infection has cleared. Whenever there are signs of an abscess, a dental examination is necessary even if the complaints subside.
Prevention
Most dental abscesses can be prevented by treating cavities and gum disease at an early stage. Your habits make the difference here:
- Brush twice a day with fluoride toothpaste and clean between your teeth every day.
- Cut down on how often you have sugary foods and drinks.
- Keep up with regular dental check-ups; small cavities treated while they still only need a filling do not reach the nerve.
- Take signs of gum disease, such as bleeding gums and loose teeth, seriously.
- Have teeth that have suffered a blow checked by a dentist even if they do not hurt; teeth that lose their vitality can turn into an abscess without causing symptoms.
- Wear a mouthguard during sports and avoid biting ice and hard objects.
For other frequently asked questions about abscesses and toothache, you can visit our frequently asked questions page.
When should you see a dentist for abscess symptoms?
If you notice throbbing pain in a tooth, swelling in your gums or face, or a draining bump on your gum, it is advisable to be examined soon. If the swelling is growing quickly or you have difficulty swallowing or breathing, go to the emergency department. At our polyclinic in Oran, for patients who come in with an abscess, the priority is to find the source of the infection and relieve the pain; if the tooth can be preserved, that option is considered first.
Frequently asked questions
Does a dental abscess go away on its own?
No, a dental abscess does not go away on its own. When the abscess drains through a fistula, the pain may ease, but unless the source of infection is treated it will come back and may spread. For this reason, a dental examination is necessary even if the symptoms subside.
Are antibiotics alone enough for a dental abscess?
Antibiotics can help limit the spread of the infection, but they do not treat the abscess on their own. The source of infection needs to be removed by drainage, root canal treatment, gum treatment or extraction. Antibiotics should only be used when the dentist considers them necessary and exactly as prescribed.
Can an abscessed tooth be saved with root canal treatment?
In many cases, yes. If the tooth has enough healthy structure left and the supporting tissues are in suitable condition, the infection can be cleaned out with root canal treatment and the tooth preserved. Whether the tooth can be saved is determined by the dentist after an examination and X-rays.
What should I do if the swelling in my face is getting bigger?
If the swelling is growing quickly or spreading to the area around the eye or to the neck, or if you have difficulty swallowing or breathing, a high fever or marked difficulty opening your mouth, go to the emergency department without delay. These symptoms may indicate that the infection is spreading.
