Facial swelling from a tooth: when it stops being a dental problem

A swollen face from a dental infection is the one situation on this site where our advice may be to skip us entirely. Toothache is miserable. Swelling that involves the airway is dangerous, and the difference is worth knowing before it is two in the morning.

When do I go to hospital instead of a dentist?

Go to an emergency department — Grand River Hospital is the closest to us — or call 911 if you have any of these:

• Difficulty breathing or swallowing, or a change in your voice
• Swelling closing your eye, or any change in your vision
• You cannot open your mouth more than a finger’s width
• Drooling, because swallowing has become hard
• Fever, shivering, or confusion alongside the swelling
• Swelling spreading down the neck, or growing quickly over hours

Have someone drive you, or call an ambulance. These are signs an infection is moving into the spaces around the airway, and that is treated in hospital, not in a dental chair.

Why is swelling different from pain?

Pain means a nerve is irritated. Swelling means infection has left the tooth and entered the surrounding tissue. Tissue in the floor of the mouth and the neck is loose and gives way easily, so an infection that finds it can travel further in a few hours than most people expect — which is why the clock matters here in a way it does not with an ache.

Will it settle on its own?

The visible swelling may go down for a while, and that is the trap. The source — a dying nerve, a deep cavity, a gum pocket — is still there, and the infection comes back, usually larger. Swelling that eases is not swelling that is resolved.

What can I do while I arrange to be seen?

• Cold compress on the outside of the face, never heat. Heat encourages infection to spread.
• Stay upright, including propped up to sleep.
• Over-the-counter pain relief as directed on the label.
• Nothing against the gum — no aspirin, no clove oil packed into the tooth.
• Do not start antibiotics you already have at home. An antibiotic without treating the source is a delay dressed up as a treatment, and a part-course does more harm than none.

What treatment actually fixes it?

Draining the infection and dealing with what caused it — root canal treatment to clean out a dying nerve, or removing the tooth. Antibiotics support that, they do not replace it. We will tell you plainly which route your tooth needs and what it costs before we begin.

Call us at (519) 884-8594; voicemail is picked up from 8am and urgent calls come back first. If any of the signs at the head of this page apply, go to hospital first and call us afterwards. Our emergency and urgent care page covers the rest, and tooth pain at night deals with the ache that has not reached this stage.

Warning signs follow published emergency guidance for dental abscess, including the NHS dental abscess guidance. It is general information, not a diagnosis — if you are worried about swelling, be seen.