Dental abscesses: a common yet serious dental emergency. Each year, over 200,000 Americans suffer from dental abscesses — a painful and potentially dangerous condition that requires immediate attention. Although it may only happen once in a lifetime for the average person, its impact can be severe if not treated promptly.
In this blog, we will explore in detail what is dental abscess, its causes, symptoms, consequences, treatment options, and how to prevent it.
What is dental abscess?
A dental abscess is a localized infection in the mouth that causes pus to build up due to a bacterial invasion. It usually forms at the root of a tooth or in the surrounding gum tissue. The condition can be very painful and may spread to other parts of the body if untreated.
A dental abscess can occur in different parts of the mouth. There are two main types of dental abscesses. The first type, called a gingival abscess , occurs in the gum. The second type, known as a periapical abscess , usually results from necrosis of the tooth’s nerve and develops inside the bone.
- Gum abscess: Develops in the gums near a tooth, often as a result of gum disease or trapped food and bacteria in periodontal pockets.
- Periapical abscess: Occurs at the tip of a tooth root, usually caused by untreated tooth decay or trauma leading to nerve death.
Causes of dental abscess
One of the most common causes is untreated tooth decay. Many people avoid regular dental visits because they fear pain — in fact, 1 in 4 people have dental anxiety. This fear can lead to neglected oral health, increasing the risk of serious infections like abscesses.
Other common causes of dental abscesses
1. Dental trauma
If a tooth is damaged by an injury (even in the past), the inner part of the tooth (called the pulp) can die. This dead tissue may get infected, leading to an abscess.
2. Gum disease
Infections from gum disease can spread into the area between the teeth and gums, allowing bacteria to multiply and form an abscess.
3. Dry mouth
People with dry mouth are at higher risk for both tooth decay and gum infections, which can lead to abscesses.
4. Poor oral hygiene
Not brushing and flossing regularly allows plaque and bacteria to build up on teeth and gums. Over time, this can lead to tooth decay and gum infections — both of which can cause abscesses.
5. Wisdom teeth issues
Wisdom teeth (the third molars that usually come in after age 18) can be partly covered by gum tissue. This area can trap food and bacteria, leading to infection and abscesses.
Symptoms of dental abscess
When you visit the dentist for emergency treatment, what they see and how they treat you will depend on the type of abscess you have.
1: Symptoms of periodontal abscess
- the gums appear red, smooth and painful
- the gums are marked by the presence of swelling
- a bad taste in the mouth and bad breath
- a purulent discharge
- significant pain when chewing
- possible dental mobility.
2: Symptoms of periapical abscess
- severe pain and a feeling of heat in the affected tooth
- swelling of the gums and face
- a bad taste in the mouth and bad breath
- hypersensitivity in the tooth
- pain when chewing
- a possible presence of fever
- a growth of the lymph nodes.
Consequences of dental abscess
Ignoring a dental abscess can have serious health consequences. Possible outcomes include:
- Spread of infection to nearby tissues (face, jaw, throat)
- Sinus infections
- Loss of the affected tooth
- Formation of dental cysts
- Sepsis (life-threatening bloodstream infection)
- Endocarditis (infection of heart lining)
- Brain or lung infections in severe cases
Prolonged infection also puts strain on the immune system and may lead to chronic fatigue.
Treatment of dental abscess
A dental abscess never heals on its own and, if left untreated, can lead to complications. This is why it must be treated by a dentist.
How dentists treat a dental abscess
After examining your mouth and possibly taking an X-ray, the dentist will usually begin by draining the abscess to remove the pus and reduce the infection.
This operation takes place in two stages:
- cleaning the tooth canals (located in the roots of the tooth) which often contain infected tissue (or dental pulp);
- placing a paste in place of the removed pulp, to prevent further dental infection.
Certain situations require special treatment:
- If the abscess starts in the gums, the dentist will clean the space between the tooth and gum.
- If the infection is severe, the dentist may need to remove the tooth.
The dentist administers local anesthesia to prevent pain, so you will only feel numbness on the numb side of your mouth.
Should you take antibiotics for a dental abscess?
Antibiotics are not always needed for a dental abscess, as draining the abscess is usually the most effective treatment. Never take antibiotics on your own—especially not leftover ones from your medicine cabinet—as this can be dangerous and may contribute to antibiotic resistance.
When are antibiotics needed?
Your dentist may prescribe antibiotics before or after treatment if:
- The infection has spread to other areas
- You have a chronic health condition (like diabetes or heart valve disease)
- Your immune system is weakened
In these cases, antibiotics help control the infection and support healing.
Relieving symptoms at home (before you see the dentist)
While waiting to see your dentist, you can take a few steps to ease the pain and discomfort of a dental abscess:
- Apply an ice pack to the outside of your cheek to reduce swelling.
- Brush gently with a soft-bristled toothbrush to keep your mouth clean without irritating the affected area.
- Avoid hot foods and drinks, which can make the pain worse.
- Take paracetamol (acetaminophen) for pain relief, but avoid anti-inflammatories like ibuprofen, as they may increase the risk of complications.
These home remedies can temporarily ease symptoms, but they do not replace professional dental treatment. Also, never take antibiotics without a dentist’s advice.
Prevention of dental abscess
The best way to avoid a dental abscess is to maintain excellent oral hygiene and seek regular dental care. Prevention tips include:
- Brush your teeth twice daily with fluoride toothpaste
- Floss daily to remove plaque between teeth
- Avoid sugary snacks and drinks between meals
- Visit your dentist at least once a year
- Treat cavities and gum disease early
- Quit smoking, which harms gum health.