How To Treat An Infected Tooth? What You Need to Do

A tooth infection is a serious condition that will not go away on its own. The only way to fully treat an infected tooth is to see a dentist who can remove the source of the infection, usually through a root canal or extraction. While you wait for professional care, you can manage pain and swelling with over-the-counter pain relievers and salt water rinses. Antibiotics may be prescribed by a dentist to control the spread of infection, but they do not cure the tooth itself. Immediate dental treatment is essential because an untreated infection can spread to your jaw, bloodstream, or other parts of your body.

What Causes a Tooth Infection?

A tooth infection starts when bacteria enter the inner part of the tooth called the pulp. This usually happens through a cavity, a crack in the tooth, or a chip. The pulp contains nerves and blood vessels. When bacteria reach it, the body’s immune response causes inflammation and pus buildup. This is what dentists call a dental abscess.

Poor oral hygiene is the most common starting point. Skipping brushing and flossing allows plaque to build up. Plaque hardens into tartar, which eats away at enamel. Once decay reaches the pulp, infection follows. Other causes include untreated gum disease, previous dental work that fails, or an injury that damages the tooth. The CDC reports that about 1 in 4 adults in the United States have untreated tooth decay. That decay is a direct path to infection if left alone.

Some people think a tooth infection is just a bad toothache that will pass. It is not. The infection is a pocket of bacteria. It will keep growing until the source is physically removed or drained. No home remedy reaches inside the tooth to do that.

What Are the Signs of an Infected Tooth?

Knowing the signs helps you act fast. The most common symptom is a sharp, throbbing toothache that does not stop. The pain may spread to your jaw, ear, or neck. It often gets worse when you lie down because blood flow to the head increases.

Other signs include sensitivity to hot or cold foods and drinks, swelling in your face or cheek, and tender or swollen lymph nodes under your jaw. You might also have a bad taste in your mouth or notice pus draining from the tooth. Fever is a serious sign that the infection may be spreading. Research published in the Journal of Endodontics found that patients with dental abscesses who also had fever and facial swelling were at higher risk for hospitalization.

If you have trouble breathing or swallowing, or if swelling spreads to your neck or eye area, go to an emergency room immediately. These are signs of a life-threatening condition called Ludwig’s angina, where the infection blocks your airway.

How To Treat An Infected Tooth at Home While Waiting for the Dentist

Home care does not cure the infection. But it can make you more comfortable until you get professional treatment. The most effective at-home step is a warm salt water rinse. Mix half a teaspoon of salt in a cup of warm water. Swish it around your mouth for 30 seconds, then spit it out. Do this several times a day. The salt water helps draw out some fluid from the swollen area and can reduce discomfort temporarily.

Over-the-counter pain relievers like ibuprofen (Advil) or acetaminophen (Tylenol) can help with pain and inflammation. Ibuprofen is usually better because it also reduces swelling. Follow the dosing instructions on the bottle. Do not take more than recommended. Some people find that applying a cold compress to the outside of their cheek for 15 minutes on, 15 minutes off helps numb the area and reduce swelling.

Here is what not to do. Do not put aspirin directly on the tooth or gums. This can burn the tissue. Do not use hydrogen peroxide as a mouthwash unless your dentist tells you to. It can damage healthy tissue. Do not apply garlic, clove oil, or any other substance inside the tooth. These may offer temporary numbing but they do not treat the infection. And never try to pop an abscess with a sharp object. That can push bacteria deeper into your tissue.

What Dental Treatments Actually Cure an Infected Tooth?

There are two main treatments that remove the infection: a root canal or an extraction. A root canal saves the tooth. The dentist drills into the tooth, removes the infected pulp, cleans the inside, and seals it. Then a crown is usually placed on top to protect it. According to the American Association of Endodontists, root canal treatment has a success rate above 95 percent. Many people worry it will be painful, but with modern anesthesia it is usually no more uncomfortable than getting a filling.

An extraction removes the tooth entirely. This is done when the tooth is too damaged to save or when the infection is severe. After the tooth is pulled, the dentist cleans the socket. You may need a bridge or implant later to replace the missing tooth. Extraction is faster than a root canal but leaves you with a gap that can cause other teeth to shift over time.

Antibiotics are often prescribed alongside these treatments. Penicillin or amoxicillin are common choices. They help control the spread of bacteria through the bloodstream. But antibiotics alone cannot fix the problem. The infected pulp inside the tooth has no blood supply, so antibiotics cannot reach it in high enough concentration to clear the infection. The tooth must be physically treated.

In some cases, the dentist may need to drain the abscess by making a small cut in the gum. This releases the pus and relieves pressure. It is usually done along with a root canal or extraction.

What Happens If You Do Not Treat an Infected Tooth?

Ignoring a tooth infection is dangerous. The bacteria do not stay in the tooth. They spread through the bone of your jaw and into the soft tissues of your face and neck. This can lead to a condition called cellulitis, a widespread bacterial infection of the skin and tissue. Cellulitis from a tooth infection can cause severe facial swelling and requires intravenous antibiotics in a hospital.

The most serious complication is sepsis. This is when the infection enters your bloodstream and spreads throughout your body. Sepsis can cause organ failure and death. A study in the Journal of Oral and Maxillofacial Surgery found that dental infections were responsible for about 2 percent of all sepsis cases in hospitalized patients. That number may sound small, but it represents thousands of preventable hospitalizations each year in the United States.

Another risk is osteomyelitis, an infection of the jawbone itself. This is harder to treat and may require long-term antibiotics and surgery. The infection can also spread to the sinuses, causing sinusitis, or to the brain in rare cases, causing a brain abscess.

Some people delay treatment because of cost or fear. Many dental offices offer payment plans. Community health centers and dental schools provide lower-cost care. Emergency rooms can treat severe infections and connect you with resources. The cost of ignoring it is much higher than the cost of treatment.

Common Misconceptions About Tooth Infections

A widespread myth is that antibiotics alone can cure a tooth infection. This is not true. Antibiotics control the spread of bacteria in your body, but they cannot reach the inside of a dead or dying tooth. The tooth itself must be treated. Another myth is that if the pain stops, the infection is gone. Pain can stop when the nerve inside the tooth dies. But the infection is still there and can continue to spread silently.

Some people believe that a tooth infection will go away once the abscess drains. Drainage does relieve pressure, but the source of the infection remains. The abscess will likely return unless the tooth is treated. There is also a belief that home remedies like oil pulling or hydrogen peroxide rinses can heal an infected tooth. These may improve gum health in some cases, but they cannot reach the pulp of a tooth. No home remedy replaces a dentist.

You may hear that root canals are dangerous or cause illness. This myth comes from poorly designed research from the early 1900s. Multiple modern studies, including a comprehensive review in the Journal of the American Dental Association, have found no link between root canals and systemic disease. Root canals are safe and effective.