How Do You Know If Your Tooth Is Infected?

A tooth infection, also called a dental abscess, happens when bacteria get inside your tooth or gums. This can cause serious pain and health problems if left untreated. Knowing the warning signs helps you get help quickly.

Common Signs Your Tooth Is Infected

The most common symptom is a severe, throbbing toothache that doesn't go away. The pain may spread to your jaw, ear, or neck. It often gets worse when you lie down or chew.

Other signs include sensitivity to hot or cold foods, a bad taste in your mouth, bad breath, and swelling in your face or cheek. You might also notice red, swollen gums or a small bump on your gum that looks like a pimple.

Warning Signs the Infection Is Spreading

Seek emergency care right away if you have a fever over 100.4°F (38°C), trouble swallowing or breathing, severe facial swelling, or a fast heartbeat. These signs mean the infection may be spreading to other parts of your body.

What Causes Tooth Infections?

Tooth infections usually start from untreated cavities, cracked or chipped teeth, or gum disease. Bacteria enter through these openings and infect the soft tissue inside the tooth. Poor oral hygiene, dry mouth, and smoking increase your risk.

Treatment Options

A tooth infection will not go away on its own. You need to see a dentist for treatment. Your dentist may drain the abscess, perform a root canal, or remove the tooth if it cannot be saved.

So what antibiotic for tooth infection works best? If the infection has spread, your dentist may prescribe amoxicillin 500 mg three times daily for 3-7 days. For those allergic to penicillin, azithromycin or clindamycin are alternatives. However, antibiotics alone cannot cure a tooth infection—you still need dental treatment.

When to See a Dentist

Contact your dentist right away if you have tooth pain that lasts more than a day or two, swelling in your face or gums, or signs of infection like fever. Early treatment prevents the infection from spreading to your jaw, head, or neck.