Antibiotics for Tooth Infection

A tooth infection can develop when bacteria enter the inner part of a tooth or the surrounding gum tissue. It may begin with a small cavity, cracked tooth, untreated gum disease, or an impacted wisdom tooth. As the infection progresses, symptoms such as persistent tooth pain, swelling, sensitivity, pus, bad taste, bad breath, and fever may appear. Prompt dental evaluation is important because an untreated infection can spread to nearby tissues.

What Is a Tooth Infection?

A tooth infection, commonly called a dental abscess, occurs when bacteria reach the pulp or surrounding tissues. The dental pulp contains nerves and blood vessels, so infection in this area can cause significant discomfort.

Common symptoms include:

• Persistent or throbbing toothache
• Swelling around the tooth, gums, cheek, or jaw
• Sensitivity to hot or cold foods
• Pus or an unpleasant taste in the mouth
• Fever or tiredness
• Difficulty chewing
• Bad breath

The severity of symptoms can vary. Some infections may initially cause little discomfort, while others can produce rapid swelling and intense pain.

What Causes Dental Infections?

Untreated tooth decay is one of the most common causes. When decay progresses through the outer layers of a tooth, bacteria can eventually reach the pulp. Cracks and fractures can also provide a pathway for bacteria to enter.

Other possible causes include periodontal disease, poor oral hygiene, failed fillings or crowns, and food or bacteria becoming trapped around partially erupted wisdom teeth. Certain health conditions may also make it harder for the body to control an infection.

When Are Antibiotics Needed?

Antibiotics are not necessary for every toothache or localized dental infection. In many cases, the main problem can be resolved through dental treatment such as root canal therapy, extraction, or drainage.

A dentist may consider antibiotics when there are signs that the infection is spreading beyond the affected tooth. These may include facial swelling, gum swelling, fever, or involvement of surrounding tissues. Antibiotics may also be considered when immediate dental treatment must be delayed or when a patient's medical condition increases the risk of complications.