Infected Molar: Symptoms, Treatment, and When to Seek Care

A sore back tooth can have several causes. An infected molar is one possibility, especially when pain comes with swelling, a bad taste, or a bump on the gum. A dental abscess is a pocket of pus caused by infection. It needs prompt dental treatment; waiting for the pain to disappear is not a reliable way to tell whether the problem has healed. [6]

When to get urgent help

Call 911 or go to the nearest emergency department now if you have trouble breathing, speaking, or swallowing; swelling or pain around an eye; changes in vision; major swelling inside the mouth; or marked difficulty opening your mouth. Do not wait for a dental appointment or an online message response when these warning signs are present. [1]

If you suspect an abscess without those warning signs, contact a dentist promptly for urgent assessment. Tell the office about swelling, fever, and whether you feel unwell. Our emergency dentistry page explains how to contact Yankton Dental Clinic about urgent dental concerns. If the office is unavailable, seek another urgent dental provider.

What can an infected molar feel like?

Possible signs include a persistent or throbbing toothache, pain when biting, temperature sensitivity, a foul taste, or a pimple-like bump near the tooth. The gum or jaw may swell. A fever or feeling generally ill adds to the concern. These signs need an examination because symptoms alone cannot identify the cause. [6]

An infection near a tooth root is not always painful. A tooth that feels better may still need care. The American Association of Endodontists advises having ongoing symptoms assessed, including jaw pain, chewing pain, and swollen gums. [3]

Why does it happen, and how is it checked?

A deep cavity or a cracked or injured tooth can let bacteria reach the pulp, the soft tissue inside the tooth. Infection can then spread around the root. A dentist examines the teeth and gums and may use X-rays and other tests to locate the source. [2]

Before your visit, note when the problem started, whether it hurts to bite, and any swelling or drainage. Bring an up-to-date medication list and explain any allergies or relevant medical conditions. This helps the dental team understand your situation and discuss appropriate options. A picture or a symptom checklist cannot replace that assessment.

How is a tooth infection treated?

Treatment addresses the source of the infection. If the tooth can be saved, root canal treatment removes infected tissue from inside it, cleans the canals, and seals them. The tooth may then need a crown or another restoration. Some cases need an endodontist, a dentist who specializes in the tissues inside teeth. [3]

Other situations may require drainage or removal of the tooth. The choice depends on the examination and how much healthy tooth remains. [2] Ask which options are reasonable for your tooth, what each involves, and what follow-up is needed.

Antibiotics are not a replacement for needed dental treatment. ADA guidance recommends dental treatment rather than antibiotics for many localized tooth-related pain and swelling problems. Antibiotics may be needed when infection affects the rest of the body or when other clinical factors change the decision. Your clinician considers your symptoms, health history, and treatment needs. [4]

What can you do while arranging care?

These steps may make you more comfortable, but they do not treat the source of an abscess:

• Choose softer foods, clean gently with a soft toothbrush, and avoid very hot or cold foods if they trigger pain. Ask a dentist or pharmacist which pain medicine is safe for you, and follow the label. [1]
• Gently rinse with warm water. If food is trapped between teeth, carefully remove it with floss rather than a sharp object. [5]
• Do not put aspirin directly on the tooth or gum; it can injure the tissue. Do not squeeze, puncture, or try to drain a swollen area yourself. [2]

Keep the appointment even if pain medicine helps. When calling a dental office, describe your symptoms clearly rather than requesting a particular prescription. The next step is finding and treating the cause.

Common questions about infected molars

Does every toothache mean an infection?

No. Pain is a reason to be assessed, not proof of an abscess. A dentist uses the examination and tests to work out what is happening. [6]

If the pain stops, can I cancel the visit?

Contact the dental team before changing the plan. An infection around the root can exist with little or no pain, so comfort alone does not establish that the tooth is healthy. [3]

Why might a dentist treat the tooth without prescribing antibiotics?

For many localized dental problems, treating the tooth addresses the cause. Unneeded antibiotics add risks, including side effects and antibiotic resistance, without replacing that treatment. The prescription decision should be based on your individual situation. [4]