Facial Swelling: Dentist or Hospital Emergency Department?

Facial swelling that comes with difficulty breathing, difficulty swallowing, a swollen tongue or floor of the mouth, or swelling spreading down the neck is a medical emergency and means calling 000 or going straight to a hospital emergency department, not waiting for a dental appointment. Localised swelling around one tooth or a small gum boil, in someone who is otherwise well and can open and swallow normally, is usually the right situation for a dental practice.

If it is not clear which of those two situations applies, err towards the hospital and ring the practice afterwards.
Call (02) 9649 6468 · Book online · WhatsApp

Which signs mean hospital or 000?

These come first because nothing else in this article matters if one of them is present. Any of the following means emergency department or 000, immediately.

• Difficulty breathing, or any sense of the airway tightening.
• Difficulty swallowing, or drooling because swallowing is too painful.
• Swelling of the tongue, or of the floor of the mouth under the tongue.
• Swelling that has closed the eye, or that is tracking towards the eye.
• Swelling spreading down the neck.
• Inability to open the mouth more than a couple of centimetres.
• Fever with shivering or shaking, or feeling seriously unwell in yourself.
• Confusion, drowsiness or disorientation.
• Swelling that is visibly worsening over hours rather than days.

Do not wait to see whether it settles overnight, and do not wait for a dental appointment to become available.

Why is spreading dental swelling a medical emergency?

The head and neck are divided into fascial spaces: potential gaps between muscle and connective tissue layers. Infection that starts at the root of a tooth can track out of the bone and into those spaces, and once it does, it follows the anatomy rather than staying where it started.

Some of those spaces sit directly around the airway, under the tongue and in the floor of the mouth. Swelling there can push the tongue upwards and backwards and narrow the airway. That is an airway problem, and an airway problem is managed in a hospital.

Limited mouth opening matters for the same reason. It suggests infection has reached the muscles that move the jaw, which places it deeper than the gum and closer to structures that need hospital assessment.

This is uncommon. It is also the reason the triage is written this plainly rather than softened.

When is a dental practice the right first call?

A dental practice is generally the right place when the picture is local and the person is systemically well:

• Swelling confined to the gum or the area immediately around one tooth.
• A gum boil, or a small opening on the gum that discharges and then refills.
• A swollen cheek that is not spreading, with normal swallowing and normal mouth opening.
• No fever, no difficulty breathing, no feeling of being unwell beyond the tooth itself.

Even then, swelling should be looked at promptly rather than watched for a week. Emergency appointments are generally in the afternoon, and every call from someone in pain is treated as urgent. There is more on the emergency page.

The warning signs that precede many of these swellings are set out in the article on dental abscess warning signs.

What does the practice actually do?

Assessment comes first. That means examining the tooth and the surrounding tissues, testing which tooth is responsible, and taking radiographs, because the source of a swelling is not always the tooth that hurts most.

Where there is a collection of pus that can be drained, drainage is usually the step that produces the fastest relief. Pressure is a large part of why an abscess hurts.

Then the cause is treated. For a tooth with a dead or dying nerve, that is root canal treatment or extraction. For an infection arising from the gum and supporting bone, it is periodontal treatment. The common thread is that something has to be done to the source.

Why are antibiotics not the whole answer?

Antibiotics act on bacteria. They do not remove the dead nerve tissue inside a tooth, they do not drain a collection of pus, and they do not remove the tooth. The conditions that allowed the infection to establish are all still there when the course finishes.

That is why swelling treated with antibiotics alone so often returns, sometimes weeks or months later, usually larger. The tablets bought time. Nothing changed at the source.

It is also why a practice will not simply prescribe over the phone. Prescribing without examining the person means treating a description rather than a tooth, and it delays the treatment that would actually resolve the problem. Unnecessary antibiotic use also contributes to resistance, which is a genuine public health concern rather than a formality.

Antibiotics do have a place, alongside treatment, where infection has spread beyond the tooth or where someone is systemically unwell. That judgement is made after an examination, not before one.

Swelling around a tooth is worth having looked at rather than waited out.
Call (02) 9649 6468 · Book online · WhatsApp

If hospital is the right call, is that the end of it?

Usually not, and it helps to know that in advance. A hospital emergency department can do the things a dental practice cannot: secure and monitor an airway, give intravenous antibiotics and fluids, arrange imaging and admit someone who needs observation.

What most emergency departments generally cannot do is the dental treatment itself. The tooth that caused the infection is still there afterwards. A hospital visit for a dental infection is therefore usually followed by dental treatment, either during the admission if an oral surgery service is on site, or afterwards.

None of that is a reason to hesitate about going. It is a reason to expect a follow-up appointment rather than assuming the matter closed on discharge.

Are all facial swellings caused by teeth?

No, and it is worth knowing the alternatives exist without trying to work out which one applies. That is what an assessment is for.

Allergic reaction

Swelling of the lips, eyelids or tongue that comes on rapidly, particularly with hives, itching or a known trigger, may be allergic rather than infective. Difficulty breathing, throat tightness, a widespread rash, or feeling faint means 000 without delay.

Salivary gland problems

Swelling under the jaw or in front of the ear that appears at mealtimes and then subsides can arise from a blocked salivary duct rather than a tooth. It is generally assessed by a general practitioner or a dental practice depending on the picture.

Trauma

A knock to the face produces swelling and bruising on its own account. Where a tooth has also been damaged, the first hour after a chipped tooth covers the immediate steps. A suspected fracture, a head injury or loss of consciousness is a hospital matter.

Worth noting in one line: periodontally-induced abscess is one of the most common preventable dental emergencies, and gum infection can be carried for years without pain, which is covered in early gum disease signs people miss.

What do the treatments cost?

Root canal treatment is $1,600 to $2,200. A simple extraction is $350 to $550 and a surgical extraction is $650 to $850, with the same fees applying whether or not the tooth is a wisdom tooth.

Those figures assume no health-fund contribution. A fund may contribute, and what it contributes depends on the policy, so it is worth checking directly with the fund. A written quotation is provided before treatment begins. The extractions page and the fees page set out more detail.

Quick answers

The swelling has gone down on its own. Is it resolved?

Not necessarily. An abscess that has drained through the gum often becomes less painful and smaller while the source is untouched, and it commonly recurs. Reduced swelling is a reason to be assessed rather than a reason to cancel.

Should the swelling be pressed or squeezed?

No. Squeezing can push infection further into the tissues rather than out of them. Gentle warm salt-water rinses are reasonable while waiting for an appointment.

Is a heat pack or a cold pack better?

Cold is generally used for swelling after trauma or surgery. Heat applied to an infective swelling on the face is not advised, because it can encourage spread. If in doubt, leave it and be assessed.

Is it an overreaction to go to hospital for a tooth?

No question is a bad question, and no one is judged for presenting with a swelling that turns out to be minor. Airway compromise from dental infection is uncommon but serious, and being sent home reassured is a good outcome.

Where to go from here

If the question is whether a gum problem belongs with a dental practice or a doctor, gum infection: dentist or doctor works through it. General health information is available from healthdirect, which also runs a telephone health advice line. Berala Dental is a general dental practice with no specialist on site, and refers where a case genuinely needs one.

Once the red flags above are excluded, a swelling around a tooth can be assessed and the cause treated.
Call (02) 9649 6468 · Book online · WhatsApp

Written and reviewed by Humzah Aly, Oral Health Therapist. This article is general information only and is not a substitute for personalised dental advice. Please see a dental practitioner to discuss what is right for you.