Swollen jaw from a tooth infection — what it means

What it usually means

A swollen jaw from a tooth infection often means the infection is no longer limited to the tooth. It may have moved into the gum, cheek, or deeper tissue around the jaw.

This can happen with an abscess, a badly decayed tooth, or a tooth that is cracked or injured. Swelling can come with throbbing pain, a bad taste in the mouth, pus, fever, or trouble opening the mouth.

A dentist needs to examine it. This page is general information only, not a diagnosis or personal dental advice.

When it is an emergency

Some dental swelling can become dangerous because the mouth and jaw are close to the airway and other important areas.

Call 911 or go to the ER now if you have trouble breathing or swallowing, swelling spreading toward the eye or neck, or bleeding that will not stop.

You should also seek urgent dental care as soon as possible if the swelling is getting bigger, you have fever, you feel very weak, or you cannot open your mouth normally. Even if the pain comes and goes, swelling from a tooth infection should not be ignored.

What you can do while you arrange care

The clearest next step is to get seen by a licensed dentist as soon as you can. If you need help finding one, SteadyTooth can help you get matched with a local emergency dentist. The service is free for you, and the form asks for contact details only — no medical information needed.

While you are arranging care, you can rinse gently with warm salt water, use a cold compress on the outside of the cheek, and take over-the-counter pain relief only as directed on the label. Try not to put aspirin on the gum or tooth.

Do not place heat on the face, and do not press on the swelling. Heat and pressure may make things worse. If you notice the swelling moving higher on the face or lower into the neck, treat that as urgent.

Why a dentist still matters even if swelling goes down

Sometimes swelling eases for a while. That does not always mean the problem is gone.

An infected tooth usually needs dental treatment, not just time. Depending on the cause, a dentist may recommend draining an abscess, treating the tooth, or removing it. The right next step depends on the exam and X-rays.

If you wait too long, the infection may return or spread. That is why getting checked matters even if you feel a little better.

How SteadyTooth can help

If you are in the United States and need urgent dental help, SteadyTooth is a free service that helps connect people with an emergency dentist near them, including after-hours options in some areas. It is built to be simple, including for new immigrants and people who are more comfortable in a language other than English.

You share contact intent only: your name, phone, city or ZIP, how soon you need help, and preferred language. No medical information is needed in the form.

If you are worried about cost, dental fees vary by case, dentist, and city. You can read more on our costs page. Coverage and dental rules can also vary by state.

Common questions about jaw swelling and tooth infections

People often hope the swelling will pass on its own. Sometimes symptoms change, but the source of the infection usually still needs treatment.

If you are not sure whether what you have sounds dental, you can also browse more symptom guides. These guides are for general information only and are not a substitute for an exam by a licensed dentist or doctor.