
A severe toothache can come from several dental problems, so pain alone does not tell you whether you have an abscess. Swelling, a bad taste in your mouth, tenderness when biting, fever, or a bump on the gum near a painful tooth can provide additional clues that an infection may be present.
A dental abscess is a pocket of pus caused by a bacterial infection. It can develop around the root of a tooth or in the gum tissue beside a tooth, and it needs professional treatment rather than a wait-and-see approach.
If you have significant tooth pain, facial swelling, fever, or other signs of infection, contact Parthenon Dental about emergency dental care in San Ramon. If you’re trying to determine whether what you’re experiencing could be an abscess, the symptoms below can help you understand what deserves prompt attention.
What Is a Dental Abscess?

A dental abscess is a pocket of pus that forms because of a bacterial infection in or around a tooth. It can develop near the root of a tooth or in the gum tissue beside it, and the location often depends on how the bacteria entered.
A periapical abscess forms at the tip of a tooth’s root. This can happen when decay, a crack, or other damage allows bacteria to reach the pulp inside the tooth.
A periodontal abscess develops in the tissues supporting the tooth and is often associated with an infected pocket between the tooth and gum. Patients with existing gum problems may therefore notice swelling or tenderness around the gum rather than symptoms that seem to come from inside the tooth itself. Parthenon Dental provides gum disease treatment when periodontal problems are contributing to a patient’s oral health concerns.
Regardless of where an abscess develops, it requires dental evaluation. Identifying where the infection started helps your dentist determine what treatment the affected tooth and surrounding tissues need.
What Does a Tooth Abscess Feel Like?

A tooth abscess often causes persistent, throbbing pain, but symptoms can vary depending on where the infection is located and how it has progressed. Some people develop significant pain quickly, while others first notice sensitivity, tenderness, or swelling around one tooth.
Possible dental abscess symptoms include:
- Persistent or throbbing tooth pain
- Pain that spreads toward the jaw, ear, or surrounding area
- Sensitivity to hot or cold temperatures
- Pain or tenderness when biting or chewing
- Swollen, red, or tender gums near the affected tooth
- Swelling in the cheek, jaw, or face
- A bad taste in the mouth or foul-smelling drainage
- Fever or feeling generally unwell
- A tender or swollen lymph node under the jaw or in the neck
You do not need to have every symptom for an infection to be present. You also should not wait for pain to become severe before contacting a dentist, particularly if you have swelling, fever, drainage, or symptoms that are getting worse.
The only way to know whether an abscess is causing your symptoms is to have the tooth evaluated. Your dentist can examine the area and, when necessary, use dental X-rays to look for signs of infection around the tooth or its root.
Can You Have a Tooth Abscess Without Pain?
Yes. A dental abscess can sometimes be present without significant tooth pain, which is one reason pain alone is not a reliable way to judge whether an infection has resolved.
When infection or severe inflammation damages the pulp inside a tooth, the nerve tissue can eventually die. At that point, tooth pain or temperature sensitivity may decrease even though bacteria and infection remain around the root.
That means a toothache that suddenly improves is not always a sign that the underlying problem has healed. Pay attention to other changes, particularly swelling, tenderness when biting, drainage, a bad taste in your mouth, or a bump on the gum near the affected tooth.
If you’ve had persistent or worsening tooth pain that suddenly disappears without dental treatment, it is worth having the tooth evaluated rather than assuming the problem resolved on its own.
What Does a Dental Abscess Look Like?

Sometimes an abscess causes visible changes around the affected tooth, but not every dental abscess can be seen by looking in the mirror.
Depending on the location of the infection, you may notice:
- A swollen or red area of gum around one tooth
- A small bump or pimple-like spot on the gum
- Pus or other drainage from the gum
- Swelling of the cheek or jaw
- Increasing facial asymmetry caused by swelling
A bump on the gum may drain and temporarily become smaller, sometimes leaving a bad or unusual taste in the mouth. That does not necessarily mean the infection is gone. Drainage can relieve pressure while the underlying source of the infection remains.
The absence of visible swelling does not rule out an abscess either. An infection around the root of a tooth may be identified during a dental examination or on an X-ray before there is anything obvious to see from the outside.
When Is a Tooth Abscess an Emergency?
A suspected dental abscess should be evaluated promptly, but certain symptoms can indicate that an infection may be spreading beyond the immediate area around the tooth.
Contact a dentist promptly for symptoms such as increasing tooth pain, localized gum or facial swelling, drainage, or fever. Seek emergency medical care if you develop more serious symptoms, including:
- Difficulty breathing or swallowing
- Significant or rapidly spreading swelling of the face, jaw, or neck
- Swelling that extends toward the eye
- Severe illness, confusion, or other rapidly worsening symptoms
These symptoms can indicate that an infection is affecting areas beyond the tooth and requires immediate evaluation. Do not wait overnight to see whether difficulty breathing, difficulty swallowing, or rapidly increasing facial or neck swelling improves on its own.
If you are unsure whether your symptoms can wait, call Parthenon Dental and describe what you are experiencing. The dental team can help determine whether you need prompt dental treatment or should seek emergency medical care.

How Is a Dental Abscess Treated?
Treating a dental abscess involves addressing both the infection and the problem that allowed it to develop. The right treatment depends on where the abscess is located, how much of the tooth has been damaged, and whether the tooth can be restored.
Treatment may include draining the abscess when appropriate and treating the source of the infection. If bacteria have reached the pulp inside a tooth that can still be saved, root canal therapy may be used to remove infected tissue, clean and seal the inside of the tooth, and preserve the remaining tooth structure.
If the tooth is too severely damaged to restore, extraction may be necessary. Periodontal abscesses may require treatment directed at the infected gum tissues and periodontal pocket instead.
Antibiotics may also be prescribed in certain situations, particularly when there are signs that an infection is spreading or affecting the patient’s overall health. However, antibiotics do not necessarily eliminate the source of an infection inside a tooth. Definitive dental treatment may still be needed to address what caused the abscess.
An examination and dental X-rays can help your dentist determine where the infection started and which treatment gives the tooth the best chance of being preserved.
What Happens If You Don’t Treat a Dental Abscess?

A dental abscess is unlikely to resolve simply because the pain improves or the area drains. Without treatment of the underlying source, the infection can continue affecting the tissues around the tooth and, in more serious cases, spread into the face, jaw, or neck.
How quickly an infection progresses varies from person to person, which is why there is no reliable amount of time that is considered safe to wait. Increasing swelling, fever, worsening pain, or new symptoms are reasons to seek care promptly.
If you want a closer look at why delaying treatment matters, read our guide to what happens if you ignore an abscessed tooth. It explains how an untreated infection can progress and why feeling better does not necessarily mean the infection has cleared.
Think You Have a Tooth Abscess? Get It Checked
You do not need to wait for severe pain or obvious facial swelling before having a possible dental infection evaluated. Persistent tooth pain, tenderness when biting, a swollen area of gum, drainage, or a combination of these symptoms is enough reason to contact your dentist.
The earlier Parthenon Dental can identify where the infection is coming from, the sooner we can determine what treatment the tooth needs. If you are experiencing symptoms of a possible abscess, contact our San Ramon office for an evaluation rather than waiting to see whether the symptoms disappear on their own.