Dental Abscess: Why It Always Needs a Dentist

What is a dental abscess?

A dental abscess is a collection of pus caused by a bacterial infection in or around a tooth. It can form at the tip of the root or in the gum beside a tooth. Abscesses are painful and do not get better on their own, so the central message is simple: a dental abscess needs to be seen by a dentist.

What causes it

Dental abscesses develop when bacteria enter the tooth or gum, often as a result of:

• Tooth decay that reaches the inner pulp
• A cracked or damaged tooth
• Gum disease creating pockets where bacteria gather
• A previous dental procedure or injury

These are bacterial infections, and you can read more about how bacteria cause illness in bacterial infections explained.

Symptoms to watch for

• Intense, throbbing pain that may spread to the jaw, ear or neck
• Pain that worsens when lying down or biting
• Swelling of the gum, face or cheek
• Sensitivity to hot and cold
• A bad taste in the mouth or bad breath
• Sometimes a fever and feeling generally unwell

Why antibiotics are not the whole answer

This is an important point that is often misunderstood. Antibiotics may reduce the spread of infection and ease symptoms temporarily, but they do not cure a dental abscess. The underlying problem, such as decay or a damaged root, must be dealt with by a dentist through drainage, root canal treatment or removing the tooth.

A dentist may prescribe antibiotics in certain situations, for example if there is spreading infection or you are systemically unwell. Where they are used, medicines such as those in our Amoxicillin guide and the wider antibiotics range are among the options a clinician might consider. Always finish the prescribed course, as misusing antibiotics contributes to antibiotic resistance explained, and never rely on antibiotics alone to fix the tooth.

Easing pain before your appointment

While waiting to see a dentist, you can:

• Take pain relief such as paracetamol or ibuprofen, following the leaflet
• Avoid very hot, cold, or sugary foods and drinks
• Eat softer foods and chew on the unaffected side
• Avoid lying flat; prop your head up at night

Do not try to drain an abscess yourself.

When it becomes an emergency

Most dental abscesses are urgent but not immediately dangerous. However, seek emergency medical care if you have:

• Difficulty breathing or swallowing
• Swelling spreading to the eye or neck
• A high fever with rapidly worsening swelling
• Feeling very unwell or confused

These can indicate the infection is spreading and needs immediate treatment.

Preventing dental abscesses

Good oral hygiene is the best protection. Brush twice a day with fluoride toothpaste, clean between your teeth, limit sugary food and drink, and attend regular dental check-ups so problems are caught early.

General information only — not medical advice. Always read the patient information leaflet and consult a doctor or pharmacist before starting any medication.