Swelling and bruising after wisdom teeth: what is normal

Most people reading this are two or three days out from surgery, looking at a face that is worse than it was yesterday, and trying to work out whether that is expected. Usually it is. The urgent material sits first anyway, because the findings that cannot wait are not the ones that look most dramatic in a mirror, and a swollen cheek is a poor guide to how serious a problem is. If you had surgery here, the written post-operative instructions you were given govern, and this page is general.

Below that threshold, the signal to act on is direction rather than size. Swelling that is smaller each morning is usually behaving as expected, however large it looked on day two. Swelling that is the same or larger on the morning of day four, or that had settled and then came back, is a same-day telephone call. So is a temperature at or above 100.4°F (38°C) without facial swelling, at any point in the first fortnight. With facial swelling, it belongs in the list above rather than in a message left for later.

Some patients move up that list on history rather than on symptoms. A post-operative infection in someone who is immunosuppressed, having chemotherapy, has poorly controlled diabetes, or takes a bone-modifying medication moves faster and is seen sooner, at a stage that would otherwise be an ordinary appointment. If you take an anticoagulant or an antiplatelet medication, say so when you call, and say which one.

Surgery is a controlled injury, and the swelling that follows is the body's response to it rather than a complication of it. Within minutes of the incision, small vessels around the site widen and their walls become more permeable. Plasma and inflammatory cells move out of the circulation and into the soft tissue of the cheek. That fluid has to accumulate before it is visible, and the lymphatic vessels that clear it away work more slowly than the vessels that delivered it. The result is a curve rather than a step.

Day one is misleading for three separate reasons, which is why the day-two surprise is so consistent. The local anaesthetic is often still working for part of the evening. The vasoconstrictor mixed into it has been narrowing vessels at the site for hours. And the fluid simply has not had time to gather. Going to bed on the day of surgery feeling you got off lightly is not a misreading of how you feel — it is an early point on a curve that has not turned yet.

The turn usually comes somewhere between 48 and 72 hours. From there the direction should reverse and stay reversed: less each morning, the change more obvious over a day than over an hour. Most of the visible swelling has usually gone by the end of the first week. A firmer area over the surgical site, and a slight asymmetry that only you notice, commonly outlast the swelling proper by a week or two, and that is usually the tissue reorganising rather than anything continuing to go wrong.

How much swelling a given person gets is set mostly by the operation rather than by anything done afterwards. Lower third molars swell more than upper ones, because more bone is usually removed, the flap is larger, and the muscles that close the jaw sit directly against the field. Upper third molars tend to produce less swelling, and where they bruise, the discolouration usually shows on the cheek rather than travelling down the neck. A deeply impacted tooth that needed sectioning swells more than one that lifted out. Four teeth at one appointment swell more than two. Longer retraction of the cheek swells more than shorter. Beyond all of that there is individual variation that no classification predicts, and two people with the same films and the same operation can have visibly different faces on day three.

Cold works by narrowing the small vessels around the surgical site so that less fluid escapes into the tissue. That is the whole of the mechanism, and it explains the timing. Cold applied while fluid is still moving out of the vessels reduces how much arrives. Cold applied to a cheek that is already swollen has very little to take away, because the fluid is no longer in the vessels the cold can reach. Ice on day one is doing work for day two. Ice on day three is mostly a cold flannel on a sore face.

Twenty minutes on and twenty minutes off, against the cheek over each surgical site, through the waking hours of the day of surgery and the day after. The interval is not arbitrary: continuous cold on one area causes the vessels to open again as a protective reflex, and it risks a cold injury to the skin. Put a cloth between the pack and the face, never place ice directly on skin, and do not doze off with a pack held against the cheek. A bag of frozen peas moulds to a jaw more closely than a rigid gel pack and is easier to keep in contact with the right spot.

Elevation runs alongside the cold and is the part most often skipped. Fluid follows gravity, and a head that spends the night level with the heart accumulates more of it. Two pillows, or a wedge, or a recliner. Sit up rather than lie down during the day for the first two days. The difference this makes is not dramatic hour to hour, and it is visible in the mirror on the morning of day two.

Warmth before 48 hours works against you. Heat widens the vessels the cold was narrowing, which adds to the swelling, and it can restart oozing from a socket that had settled. This includes hot drinks, hot soup and a hot shower running on the side of the face. Lukewarm is the standard for the first two days, and a partly numb mouth judges temperature poorly, so err downwards.

Bruising after third molar surgery is blood that has escaped from small vessels at the site and moved into the loose connective tissue under the skin. The reason it does not stay where the surgery happened is anatomical: the planes between the jaw, the neck and the upper chest are continuous and offer very little resistance, so blood tracks along them and settles wherever gravity takes it. After two lower wisdom teeth, discolouration can reasonably appear along the jawline, under the chin, down the side of the neck and occasionally as far as the collarbone.

The timing catches people out more than the extent. Bruising often appears on day two, three or four — sometimes only once the swelling has started to go down — so it arrives at the point in the week when things were meant to be improving. Blood that entered the tissue on the day of surgery takes time to reach the skin surface where it becomes visible, and the areas furthest from the site are usually the last to colour and the last to clear. Discolouration appearing on day four is usually blood from the day of surgery surfacing, not fresh bleeding.

The yellow-green stage is the one most often reported as an infection, and it is usually the opposite: it is the bruise leaving. Infection does not follow a colour sequence over a fortnight. It tends to produce skin that is red rather than purple, hot rather than ordinary temperature, tight and tender rather than merely discoloured, and it comes with a rising temperature and a face that is enlarging rather than shrinking.

Some people bruise more than others, and it does not indicate that anything was done differently. Older patients bruise more, because skin and the tissue beneath it thin with age and small vessels are less well supported. Anticoagulant and antiplatelet medication increases it, as do some supplements that affect clotting — fish oil, ginkgo and high-dose vitamin E among them — which is one reason the medication list taken at consultation asks for everything bought over the counter as well as everything prescribed. None of those are stopped without instruction from the prescriber.

Trismus is limited mouth opening caused by the muscles that close the jaw rather than by the joint. After lower third molar surgery, three things act on the same muscles at once. The masseter and the medial pterygoid lie directly against the surgical field and are stretched by the retraction needed to see the tooth. The inferior alveolar block is given through the medial pterygoid, so the muscle has been punctured. And the inflammatory fluid that produces the swelling sits within and around those muscles, where it causes them to guard and shorten.

It follows the swelling curve closely, because it has the same cause. Opening tightens through day one, is at its most limited on day two or three, and usually eases over the following week to fortnight. At its worst many patients can manage two stacked fingers between the front teeth, and some manage one. Eating is often governed by how wide the mouth goes rather than by what the sockets will tolerate, which is why the diet on days two and three is soft not because chewing hurts but because a spoon will not fit comfortably.

Stacking fingers vertically between the front teeth is a rough self-check rather than a measurement, and it is useful mainly for tracking your own change from one day to the next rather than for comparing yourself against anyone else. Roughly three fingers is an ordinary adult opening. Two is expected around the peak. One, in the presence of facial swelling that is not settling, is a same-day call — and one that is getting tighter each day after day three, with swelling, belongs in the emergency list above.

• Gentle opening and closing, and gentle side-to-side movement, several times a day from about day three. Move to the point of tension and stop there.
• Warmth over the angle of the jaw before doing it, once you are past 48 to 72 hours.
• Soft food that needs little jaw travel, and cutting food small rather than opening wide.
• What does not help: forcing the jaw open against resistance, which provokes more guarding.
• What also does not help: keeping the jaw shut and still for a week, which allows the muscles to shorten further.
• Chewing gum as a deliberate exercise, which loads muscles that are already inflamed and risks debris in an open socket.

Most opening is usually back within one to two weeks. A minority take longer, and a limitation that has not meaningfully improved by two weeks is examined rather than waited out — occasionally the joint itself is sore from being held open during a long appointment, and that is managed differently from muscle guarding. Persistent limitation is uncommon. What is not a normal variant is trismus that worsens after the swelling has peaked, which is the pattern the next section deals with.

The distinction is made on timing and direction far more reliably than on size. Ordinary post-operative swelling has one shape: it appears within hours, builds for two to three days, and then declines steadily. Almost everything that matters can be read off whether the swelling in front of you is following that shape or breaking it. A face that is enormous on day two and smaller on day three is behaving. A face that is moderate on day two, the same on day three and slightly larger on day four is not, however unimpressive it looks.

A slightly raised temperature in the first day or two after surgery is common and is part of the inflammatory response rather than evidence of infection. It is a different finding from a temperature that appears on day five, alongside swelling that has stopped improving, in someone who feels generally unwell. The day number is doing most of the diagnostic work in that sentence.

Post-operative infection at a third molar site often declares itself later than patients expect — commonly towards the end of the first week or during the second — which tends to be after people have stopped watching and gone back to work. A smaller number appear at two to four weeks. That is why swelling arriving after a period of steady improvement carries more weight than swelling that has simply been there since surgery.

There is one common problem that has almost no swelling attached to it at all. Dry socket is a pain pattern rather than a swelling pattern: discomfort that had been improving turns sharply worse around day three to five, often radiating towards the ear or temple, with a bad taste, in a face that is not enlarging and without fever. It is painful rather than dangerous, and it is treated at an urgent appointment rather than waited out. If your face is settling and your pain is escalating, that is the direction to be thinking in.

None of these distinctions has to be made by you. They are made by examining the site, and the point of the table above is to decide whether to telephone, not to reach a diagnosis at home. An examination establishes whether there is a collection to drain, whether the socket is empty, whether antibiotics are indicated, and whether the problem is confined to where it started. That is not a determination that can be made over a telephone line or from a photograph.

• Cold for the first 24 hours, in twenty-minute intervals, with a cloth between the pack and the skin.
• The head raised above the level of the heart, day and night, for the first two days.
• Warmth from about 48 to 72 hours, and warm salt-water rinses from day two, allowed to fall from the mouth rather than spat.
• Gentle jaw movement from around day three, to the point of tension and no further.
• Soft, cool food and steady fluids. Appetite drops, and protein is the thing most often missed in the first few days.
• No smoking. Nicotine constricts the small vessels supplying the site and the suction acts on the clot; vaping applies the same negative pressure.
• No straws, no vigorous rinsing, no spitting for the first several days.
• No strenuous exercise until the swelling is clearly falling. Raising the blood pressure can restart bleeding into tissue that is already holding fluid.

Medication is where a general article should be least specific. Take pain relief on the schedule in your written instructions, and take the first dose before the local anaesthetic wears off rather than waiting for discomfort to arrive, because staying ahead of it takes less medication than catching up to it. An anti-inflammatory pain reliever acts on the inflammation as well as on the pain, and it is not suitable for everyone: stomach ulceration, kidney disease, some bleeding disorders, asthma in a minority of people, and pregnancy are all reasons to ask before taking one. Doses, intervals and how anything interacts with your regular medication come from the sheet you were given, not from this page.

Where a corticosteroid forms part of a surgical plan — it is sometimes considered for deeper impactions, or where several teeth are removed at one appointment — that is decided at the consultation against your medical history and the operation planned. It is not something to start at home, and it is not a reason to alter any steroid you already take; that decision stays with the prescriber.

Several popular measures have no established effect on swelling after third molar surgery, and naming them saves time that would otherwise be spent on them. Pineapple and bromelain supplements, arnica in its various preparations, herbal poultices, and lymphatic massage of a fresh surgical site all fall into that group. Most are unlikely to do harm in the ordinary case, and none of them substitutes for cold in the first day, for elevation, or for a telephone call when the direction of travel is wrong. Massage over an area that is red, hot and tight is the one to actively avoid.

Alcohol is out while taking pain relief and while the site is fresh, both because of the interaction and because it dilates vessels. Sleeping flat on the operated side, which patients do without meaning to, tends to produce a visibly more swollen morning on that side. Neither of those is a complication; they are simply two of the more common reasons day three looks worse than it needed to.

The threshold for telephoning is lower than most patients set it. What settles whether swelling is behaving is a comparison with yesterday and a temperature reading, and you already have both. Swelling that is still enlarging on day four and has been described to nobody is the version of this that turns into a longer problem than it needed to be.

• Swelling that is the same size or larger on the morning of day four, or later.
• Swelling that had settled and then returned, at any point in the first month.
• A temperature at or above 100.4°F (38°C). With facial swelling, treat it as the emergency list at the top of this page rather than as a call.
• Mouth opening that is getting tighter after day three rather than easier.
• Pus, or a persistent foul taste or smell that a salt-water rinse does not shift.
• Pain that had been improving and then sharply worsened, typically around day three to five.
• Numbness or altered sensation in the lip, chin or tongue that is still present the morning after surgery, or that appears later — on the same day you notice it.
• Bleeding that restarts and does not settle with thirty minutes of firm, unbroken pressure on folded gauze.
• Anything on the emergency list at the top of this page, which is 911 or an emergency department rather than a telephone call to a dental office.

Four pieces of information make the call quicker and the advice more precise. Which day you are on, counting the day of surgery as day zero. Your temperature taken with a thermometer rather than by feel, in degrees Fahrenheit. How wide the mouth opens, in stacked fingers. And whether the swelling is larger, smaller or unchanged compared with the same time yesterday — which is why a photograph taken each morning in the same light, from the same angle, is more useful than any description either of us can produce from memory. Have your medication list to hand as well, including anticoagulants and anything bought over the counter.

The practice is in Aventura, in north Miami-Dade. Post-operative problems are settled by examining the site rather than over the telephone, so it is worth knowing in advance where you are travelling to and how long it takes you. Opening runs into the evening earlier in the week and finishes earlier on Friday and on Saturday; Sunday is closed. If something on the emergency list happens when the office is shut, or if you telephone and cannot reach anyone, the answer is an emergency department rather than a message left for the morning. For airway symptoms, spreading swelling, and fever with facial swelling, that is the correct destination whatever the day of the week.

One last point about the written instructions handed to you after surgery. They are specific to the teeth that were removed, to how the surgery went, and to your medical history, and where they differ from anything on this page they are the ones to follow. A general article can describe the ordinary curve and the recognised departures from it. It cannot know that your lower left root was sitting against the canal, or that your medication list changes the bleeding advice. Keep the sheet somewhere you can find it at eleven at night on day three, which is when most people go looking for it.