Dental Abscess: Causes, Symptoms, Treatments, and Prevention
Also known as: Tooth abscess
What is a dental abscess?
A dental abscess is a localized bacterial infection that causes pus to form at the root of a tooth or in the gum. There are two types:
- Periodontal abscess (in the gum)
- Periapical abscess (at the tooth root, following infection of the nerve)
In most cases, it results from an untreated cavity, a cracked tooth, or an infection of the tooth pulp. Without treatment, the infection can spread to the jaw and beyond.
Symptoms
Warning signs include:
- Intense, throbbing tooth pain, often worse at night
- Cheek or gum swelling
- A white spot of pus on the gum
- Bad breath or an unpleasant taste in the mouth
- Sensitivity to heat, cold, or pressure
- Tender lymph nodes under the jaw
- Sometimes fever, fatigue, general malaise
Causes and risk factors
Main causes:
- Untreated cavity reaching the pulp
- Cracked or fractured tooth
- Advanced periodontitis (gum disease)
- A poorly sealed crown or dental filling
- Impacted wisdom tooth
Risk factors:
- Poor oral hygiene
- A diet high in sugar
- Smoking and alcohol use
- Diabetes
- Weakened immunity (HIV, chemotherapy, corticosteroids)
- Dry mouth (xerostomia)
Diagnosis
Diagnosis is made by a dentist or doctor through a clinical exam:
- Palpating the painful area
- Testing sensitivity to heat, cold, or percussion
- Panoramic or periapical X-ray to identify the pus pocket
- Sometimes a dental CT scan (cone beam) for complex cases
Treatment
Treatment combines several steps:
- Draining the pus (incising the abscess or opening the tooth)
- Dental care: root canal treatment, or extraction if the tooth can’t be saved
- Antibiotics if there’s fever or systemic signs
- Pain relievers (acetaminophen) for pain
Avoid aspirin and anti-inflammatories without medical advice: they can worsen the infection.
To ease discomfort in the meantime:
- Rinse with warm salt water
- Avoid very hot, very cold, or very hard foods
- Sleep with your head elevated
Prevention and tips
- Brush your teeth twice a day (morning and night, 2 minutes)
- Use dental floss or interdental brushes daily
- See a dentist regularly for a cleaning and checkup (often every six months)
- Treat cavities as early as possible
- Limit sugar, tobacco, and alcohol
- Wear a mouthguard for contact sports
- Watch for any tooth pain that lasts more than 24 to 48 hours
When should you see a doctor?
Seek care promptly if:
- There’s significant swelling of the face or neck
- You have a high fever (above 101.3°F / 38.5°C)
- You have trouble opening your mouth, swallowing, or breathing
- The pain is unbearable and not relieved by acetaminophen
- You feel generally unwell
Call 911 if you have trouble breathing, widespread swelling, or altered consciousness.
FAQ
Can a dental abscess heal without antibiotics? No. Antibiotics alone are never enough: dental care (drainage, root canal, or extraction) is essential.
Can I get antibiotics for a dental abscess online? Yes. During a Tessan visit, a doctor can prescribe antibiotics and pain relievers while you wait to see a dentist.
Should I pop a dental abscess myself? Absolutely not. This worsens the infection and can cause serious complications.
When should I go to the emergency room? If there’s significant neck swelling, high fever, trouble swallowing or breathing, or trismus (inability to open your mouth).
Is a dental abscess dangerous? Yes, if untreated: the infection can spread to the jaw, neck, or even the bloodstream (sepsis).
How long does treatment take? Relief comes within 24 to 48 hours with antibiotics. Full healing often requires several dentist visits.
Can dental abscesses be prevented? Yes, with rigorous hygiene and regular dental checkups.
Can a child get a dental abscess? Yes, including in baby teeth. A dental visit is essential to prevent lasting damage to the permanent tooth.
Sources
- American Dental Association (MouthHealthy), dental health and abscess guidance
- MedlinePlus, U.S. National Library of Medicine, tooth abscess