Is this a dental emergency? A checklist

A dental problem becomes a 911 or emergency-department problem the moment it touches the airway or spreads beyond the mouth. Difficulty breathing, difficulty swallowing, a voice that has changed in quality, swelling that has closed the eye or raised the floor of the mouth so the tongue is pushed up, fever with facial swelling, and bleeding that will not stop under firm pressure are all in that group. None of those is a wait-and-see problem, and none of them should be routed through a callback.

• Any difficulty breathing or swallowing, drooling because swallowing hurts, or a voice that has become muffled or hoarse. Swelling from a dental infection can track into the fascial spaces around the airway, and that is a hospital problem from the moment it starts, not a dental one.
• Swelling that has closed the eye, crossed to the other side of the face, tracked down into the neck, or raised the floor of the mouth under the tongue.
• Fever above 38.5 degrees Celsius, about 101.3 degrees Fahrenheit, together with facial swelling.
• An inability to open the mouth more than a couple of centimetres when there is swelling present. Restricted opening means the infection has reached the muscles that move the jaw.
• Bleeding that does not stop after twenty minutes of firm, continuous pressure on the site.
• Any head injury with loss of consciousness, vomiting or confusion. Any injury to the eye or any change in vision.
• A jaw that will not close correctly, a bite that has changed after an impact, or numbness of the lip and chin after a blow. Those suggest a fracture.

Two of those deserve a note about why they are on the list. Restricted mouth opening, called trismus, is easy to dismiss as soreness, but in the presence of swelling it marks a specific anatomical step: the infection has left the tooth and reached muscle. And a patient who describes feeling better on the day the swelling worsens is describing pressure that has escaped into soft tissue, which is a progression, not an improvement.

Symptoms that mean you need to be seen today rather than this week are the ones that show an infection has moved outside the tooth, or that bleeding is not under control. Facial swelling without airway involvement, a tooth that feels raised in the bite, post-operative bleeding that has restarted, and pain that has not responded to over-the-counter analgesia at the doses on the packet all belong in that group. The table below sets the common presentations against what each one usually reflects and what to do about it.

One row deserves expanding, because it is the one patients most often misread. A tooth that feels raised in the bite is describing fluid under pressure at the root tip pushing the tooth a fraction of a millimetre out of its socket. It is not a bite problem and it does not settle by adjusting how you chew. It is the earliest reliable sign of an abscess forming, and it is the point at which same-day assessment is straightforward and unglamorous rather than urgent.

Urgent same-day dental care covers problems that are progressing but have not yet reached the airway or produced a systemic response: facial swelling without any breathing or swallowing difficulty, a localised abscess, a tooth that has become tender to touch, post-operative bleeding that has restarted and is not settling with gauze pressure, and pain that has not responded to over-the-counter analgesia taken at the doses stated on the packet. Each of those is manageable in an office and each of them gets harder to manage overnight.

One group moves faster than the rest and is therefore seen sooner for the same presentation: patients who are immunosuppressed, who are having chemotherapy, whose diabetes is poorly controlled, or who take a bone-modifying medication. The same-looking swelling in those patients has a different trajectory. Say so when you call, because it changes where you go in the day rather than what you are told.

Post-operative bleeding has a threshold worth stating precisely. Oozing that tints saliva pink for the first day after a third-molar extraction is expected. Bleeding that has restarted and fills the mouth, or that is still frankly red after twenty minutes of firm, continuous pressure on a folded gauze placed directly over the socket, is not. Bite down without checking every two minutes, because lifting the gauze to look is the most common reason pressure fails.

A large part of what arrives as an emergency call is genuinely uncomfortable and genuinely not urgent. A chipped tooth with no pain, a lost filling, a crown that has come off, a broken denture, a sharp edge cutting the tongue or cheek that a piece of orthodontic wax will manage until the appointment. A sore wisdom tooth with mild swelling confined to the gum around it, no fever, and normal mouth opening belongs here too.

• Persistent mild sensitivity to cold that settles within a few seconds of the stimulus being removed.
• Food packing into an extraction site during the second or third week after surgery. That is expected, and it is managed with an irrigating syringe rather than an urgent appointment.
• Dull, generalised jaw ache that is worse on waking and improves through the day, and clicking on opening without locking. Both point towards the joint and the muscles rather than a tooth.
• An ulcer, patch or lump present for less than two weeks with no other symptoms. Anything still there at two to three weeks should be looked at rather than watched further.

There is a reason to be accurate about this rather than generous. Treating a clicking jaw as an emergency takes an urgent slot from a patient with facial swelling, and facial swelling is the one thing an urgent slot exists for. The list above is not a way of telling anyone their pain is unimportant; it is a way of keeping the same-day capacity pointed at the problems that will be worse tomorrow.

The two-to-three-week rule on an ulcer or a patch is the one item here that is a hard boundary rather than a judgement. Ordinary trauma from a sharp edge or a cheek bite heals in that window. Something that has not healed in three weeks is being followed up because persistence is the signal, regardless of how small it is or how little it hurts, and regardless of who removes it from your mind by telling you it looks like nothing.

Swelling is more serious than pain because swelling describes where an infection has reached, and pain does not. Severe pain frequently accompanies a condition that is entirely local, such as an exposed pulp or a dry socket, neither of which is spreading anywhere. A spreading infection, meanwhile, sometimes hurts less as it spreads, because the pressure that caused the pain has escaped into the surrounding tissue. Patients occasionally describe feeling better on the day the infection becomes serious.

Swelling confined to the gum around a tooth is one thing. Swelling that has crossed into the cheek, under the jaw, up towards the eye, or into the floor of the mouth has entered a fascial space, and the management changes accordingly: drainage, antibiotics, and in the deeper spaces, hospital admission and airway monitoring. The anatomy is what makes this specific rather than cautious. The spaces under the tongue and under the jaw are continuous with the spaces around the throat, so an infection in the lower jaw has a short route to the airway that an infection in the upper jaw does not.

The other reliable signals are systemic rather than local: fever, feeling generally unwell, a rising heart rate, and any change in swallowing or voice. A dental problem that has begun producing symptoms outside the mouth has stopped being a dental problem in the ordinary sense. Assess it the same hour, not the same week.

The useful actions in the interval before assessment are few, and the harmful ones are common. Keep firm pressure on a bleeding socket with folded gauze or, failing that, a clean folded handkerchief, and keep it there without inspecting it. Sit upright rather than lying flat, which reduces both bleeding and the sensation of pressure in a swollen face. If swallowing is becoming difficult, do not lie down at all, and do not drive yourself.

1. Write down when the swelling started, how far it has spread since, and whether opening the mouth has become harder. That timeline is the single most useful thing you bring with you.
2. Take your temperature if you can, and note it with the time.
3. Bring an accurate list of every medication you take, including anticoagulants, bisphosphonates and other bone-modifying agents, immunosuppressants and diabetes medication. Bring the packets if that is easier than writing them out.
4. Note any previous complication under anaesthesia, in yourself or a close relative, and when you last ate or drank anything.
5. Take a photograph of the swelling on arrival. Comparing it against the same view three hours later is more reliable than anyone's memory of how it looked.

What not to do is equally specific. Do not place an aspirin or any tablet against the gum, which burns the tissue and treats nothing. Do not apply heat to a facial swelling. Do not start, stop or change the dose of any medication, including a leftover course of antibiotics from a previous problem, without being told to by the clinician who is treating you; a partial course taken from the cupboard makes the picture harder to read and the organism harder to treat. And do not stop an anticoagulant because you are bleeding from a socket. That decision belongs to the prescriber, not to the person holding the gauze.

If sedation or general anesthesia may be part of what happens next, when you last ate or drank matters, which is why it is on the list above. Do not eat or drink anything further once you have decided you are going to be seen, and say what time you last did when you call or arrive.

Call an oral surgeon when the problem is a third molar or the recovery from one and the symptoms are confined to the mouth and face without airway involvement, fever or uncontrolled bleeding. Go to an emergency department when any of those three is present, and go there first without calling anyone. That is the whole division, and it is worth stating because the phone is the slower of the two routes when an infection is moving. A separate article on this site works through that triage decision in more detail; this page is about what counts as an emergency in the first place.

The scope of this practice is third molars and the anaesthesia that goes with them. Trauma, facial fractures, pathology, and dental problems involving other teeth are treated elsewhere, and being told so quickly is more useful than being worked into a slot by someone who will then refer you on. If you call about a problem that is not a third molar, you will be pointed at the right place rather than kept.

Two things fall outside any dental office by definition. An airway that is narrowing needs monitoring and, potentially, an anaesthetist and an operating theatre; that is a hospital capability, not an office one. And a fascial-space infection may need drainage under general anesthesia with an inpatient stay afterwards. Recognising those early and sending someone straight to the right building is a better outcome than seeing them first.