Wisdom Tooth Pain: What Causes It and How to Get Relief

What Causes Wisdom Tooth Pain

The pain almost always comes from the same underlying problem: the tooth is trying to fit into a space that is not there. A few specific things follow from that.

• An impacted tooth with no room. When a wisdom tooth is blocked by the tooth in front or by the jaw itself, it pushes without ever fully coming through. That steady pressure aches at the back of the jaw and can spread forward.
• An infected gum flap (pericoronitis). When a wisdom tooth only half comes through, a flap of gum sits over part of it. Food and bacteria collect underneath, the gum gets red, swollen and sore, and it can leave a bad taste or leak pus. This is the most common reason a wisdom tooth suddenly hurts a lot, and it tends to come back.
• Decay or gum disease. The back of the mouth is hard to reach with a brush, so wisdom teeth trap plaque and decay more easily than the rest. A cavity that deep can reach the nerve and turn into the kind of pain that keeps you up.
• Pressure on the tooth in front. An angled wisdom tooth can press into its neighbour, which aches and, over time, can damage that second molar.

Rarely, a cyst forms around a buried wisdom tooth. That is not usually painful at first, which is one reason a dentist will want an X-ray even when the ache seems minor.

How to Ease Wisdom Tooth Pain Tonight

None of this fixes the cause, but it can bring a bad night down to a manageable one until you are seen.

• Rinse with warm salt water. A teaspoon of salt in a cup of warm water, swished around the back tooth several times a day, cleans out the gum flap and settles the swelling. For an infected flap this is the single most useful thing you can do at home.
• Take an over-the-counter anti-inflammatory, if it is safe for you. Ibuprofen tends to work better than paracetamol here, because the pain is inflammatory. Our guide to painkillers for a toothache covers what actually helps and what to avoid.
• Hold a cold compress against your cheek on the sore side for about ten minutes at a time, to numb it and keep swelling down.
• Keep the area clean. Brush gently right to the back, even though it is tender. Food packed under a gum flap is what keeps it inflamed.
• Prop yourself up in bed. Lying flat sends more blood to your head and makes the throbbing worse, which is why wisdom teeth so often hurt most at night. Our guide to sleeping with a toothache has the rest.

Two things to skip. Do not hold an aspirin against the gum, because it burns the tissue and does nothing for the tooth. And do not lean on rinsing and painkillers for weeks. They quiet the pain without touching what is causing it, and a gum flap calmed down at home tends to flare up worse later.

When Wisdom Tooth Pain Needs a Dentist

A wisdom tooth that grumbles for a day as it pushes through, then settles with some salt-water rinsing, is common and not a cause for alarm. Book a normal check-up when it suits you and keep the area clean in the meantime. Get seen sooner if any of these are true:

• The pain has lasted more than a day or two, or keeps coming back.
• The gum at the back is swollen, leaking pus, or leaving a bad taste.
• You cannot open your mouth fully, or it hurts to swallow.
• The pain is bad enough to disturb your sleep or stop you eating.
• There is a hole or obvious decay you can see or feel in the tooth.

Here is the honest part: waiting to see if wisdom tooth pain settles on its own is usually the more expensive choice. An infected gum flap almost never clears for good by itself. It quietens, you forget about it, and it flares again weeks later, often bigger. Seen early, it is often a clean-out and some advice. Left to keep flaring, it becomes a swelling, sometimes an abscess, and a more urgent removal. Our guide to painful, inflamed gums goes through what is behind that swelling.

When It's a Hospital, Not a Dentist

Most wisdom tooth pain is a dentist's job, not an emergency room's. But an infection at the back of the jaw sits close to the airway, and now and then it spreads. Go to a hospital emergency room, not a dental clinic, if you have any of these:

• Swelling that is spreading across your face or down into your neck.
• Trouble swallowing, breathing, or fully opening your mouth.
• A fever, or feeling genuinely unwell and shivery along with the tooth.
• Swelling closing your eye or pushing out under your jaw.

These are signs the infection has moved beyond the tooth, which is past what a dentist can safely handle in a chair. Our guide to facial swelling from a tooth infection covers the warning signs in detail.

Does Wisdom Tooth Pain Mean It Has to Come Out?

Not always, and any dentist who says every sore wisdom tooth must go is skipping a step. A wisdom tooth that has room to come through straight, and is only sore because a flap of gum is briefly in the way, can often stay. We clean the area, clear any infection, and it settles as the tooth finishes erupting.

Removal is the answer when the tooth is impacted with nowhere to go, when the gum flap keeps getting infected, when there is decay too deep to fix in a tooth that far back, or when it is damaging the tooth in front. In those cases the pain keeps returning until the tooth is out. Our guide to when a wisdom tooth actually needs removing lays out the difference, and what recovery after an extraction looks like covers the days afterward. What we will not do is take out a tooth that has a good reason to stay.

If a wisdom tooth is aching and you are not sure whether it needs seeing, call or WhatsApp 055-985-8845 and send a photo of the area if you can. We will tell you whether it needs treating now or can wait, and if it is a gum flap that better cleaning will settle, we will say so. We are in Ramat Beit Shemesh, open Sunday to Thursday 8:00 AM to 8:00 PM and Friday 8:00 AM to 2:00 PM, with after-hours emergency treatment outside those hours. Our emergency dentist and dental infection treatment pages explain how we handle an infected or impacted wisdom tooth.

For guidance from sources with nothing to sell, the ADA's MouthHealthy explains why wisdom teeth cause problems and what a dental abscess is, and the American Association of Oral and Maxillofacial Surgeons covers when an impacted wisdom tooth needs managing.