A tooth infection, also called an abscess, is what happens when bacteria reach the soft pulp inside a tooth and build into a pocket of pus. It's a real infection, and it won't clear up on its own. Caught early, it's very treatable. Left alone, it can spread to your jaw and beyond, which is why knowing the warning signs matters.

If you recognize several of these in yourself, don't wait it out. Call a dentist.

This is general information, not a diagnosis. If you have facial swelling, a fever, or trouble breathing or swallowing, treat it as urgent. Call (310) 378-9241 or, for breathing or swallowing trouble, go to an emergency room.

The warning signs to watch for

Throbbing pain that won't quit. A tooth infection usually hurts with a deep, constant, pulsing ache. It can radiate into your jaw, ear, or neck on the same side. Unlike a quick zing of sensitivity, this pain hangs around and often gets worse over hours.

Swelling in your gum, cheek, or face. Swelling is one of the clearest signs that infection is spreading past the tooth. It might be a puffy spot on the gum or a noticeably swollen cheek or jaw. Any facial swelling with tooth pain is a same-day problem.

A bad taste or smell in your mouth. When an abscess drains, it releases pus, which tastes foul and salty and can give you bad breath that brushing won't fix. Sometimes you'll feel the pain ease right as this happens, because the pressure is releasing. The infection is still active.

A pimple-like bump on your gum. A small bump near the root of a sore tooth, sometimes white or red, is the body's drainage point for the abscess. It may come and go. It's a sign the infection has been there a while.

Sensitivity to heat and pressure. Infected teeth often hurt with hot food and drinks and ache when you bite down, because the tissue around the root is inflamed and tender.

A fever or feeling generally unwell. When your body mounts a fever, the infection has your immune system working overtime. Fever with tooth pain means the problem is no longer contained to one tooth, and that's urgent.

Tender or swollen glands in your neck or jaw. Swollen lymph nodes under the jaw are another sign your body is fighting an infection nearby.

You won't necessarily have all of these. Even two or three together are enough reason to get seen quickly.
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Why you can't just wait it out

One thing catches people off guard. Sometimes the pain from an abscess suddenly stops, and it feels like a relief. Often it means the nerve inside the tooth has died, or the abscess has found a way to drain. The infection itself hasn't gone anywhere. It's still there, still active, and still capable of spreading to your jawbone, sinuses, or soft tissue.

This is also why antibiotics alone aren't the answer. They can calm a spreading infection temporarily, but they don't fix the tooth that's letting bacteria in. Without treating the source, the infection comes back, often worse. The real fix deals with the tooth.
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What a dentist does about it

Treatment starts with draining the infection and relieving the pressure, which is usually where the pain relief comes from. Then we treat the source so it can't return. Most often that means a root canal, which cleans the infection out of the inside of the tooth and seals it, letting you keep the tooth. If the tooth is too damaged to save, an extraction clears the infection out entirely. Antibiotics may come along for the ride when infection is spreading, but as support, not the whole plan.

At Beachfront Dentistry, we'll get you out of pain first, then walk you through the options clearly and without pressure. We keep room for urgent cases because a tooth infection isn't something that should sit on a waitlist.
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When it becomes an emergency

Go to an emergency room right away, not a dental office, if swelling is spreading toward your eye or down your neck, or if you have any difficulty breathing or swallowing. A dental infection that reaches those spaces is uncommon but dangerous and needs hospital care. For everything short of that, a same-day call to a dentist is the right move. Our guide on when tooth pain is a dental emergency breaks down the line between the two.
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Frequently asked questions

Will a tooth infection go away on its own? No. An abscess needs treatment. The pain might fade if the nerve dies or the abscess drains, but the infection stays active and can spread. It needs a dentist to resolve.

Can antibiotics cure a tooth infection? Antibiotics can slow a spreading infection, but they don't cure an abscess on their own. The tooth still has to be treated, usually with a root canal or extraction, or the infection returns.

How fast can a tooth infection spread? It varies. Some sit for weeks, others worsen over a day or two, especially once swelling starts. Because you can't predict which you have, any facial swelling or fever means get seen the same day.
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Don't ride out an infection

A tooth infection is one of the clearer signals that something needs attention now. The sooner it's treated, the more likely we can save the tooth and the less risk of it spreading. Beachfront Dentistry serves Redondo Beach and the South Bay, from Palos Verdes to El Segundo, with same-day care for urgent problems.

Experiencing pain or swelling? Contact Beachfront Dentistry today at (310) 378-9241, or request a visit online.

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