A dull ache behind the jaw that creeps up to the temple, often on one side and often worse after a long day of chewing, is a pattern dentists hear about regularly from people in their late teens and twenties. Sometimes a wisdom tooth is part of the reason. Usually the link is indirect: an inflamed gum, a tooth pushing against its neighbour, or jaw muscles working harder than they should, rather than the tooth sending pain straight into the head.
That distinction matters, because a headache with a dental cause tends to leave clues in the mouth, and a headache without those clues probably needs a different kind of assessment.
Pain from the back teeth often travels
The lower wisdom teeth sit where the jaw turns upward toward the ear, surrounded by the chewing muscles and branches of the trigeminal nerve, which also supplies most of the face and the front of the scalp. Pain arising in this region is not always felt exactly where it starts. An irritated area at the back of the jaw can be perceived as an ache in the ear, the cheek or the temple, which is why some people book a GP visit for an earache that turns out to be dental.
The most common local trouble is inflammation of the gum flap that partly covers an erupting wisdom tooth, called pericoronitis. Food and bacteria collect under that flap, the gum swells, and biting down on it with the opposing tooth keeps it irritated. People describe a throbbing back tooth, a bad taste, a stiff jaw and, in some cases, a headache on the same side.
Sore teeth can make the jaw muscles work overtime
The second route runs through the muscles. When something at the back of the mouth hurts, many people start holding their jaw tightly, chewing on the other side, or clenching while they concentrate or sleep. The masseter and temporalis muscles that do this work fan out over the side of the face and the temple. Keep them contracted for long enough and they ache, and that ache can feel very much like a tension headache.
In that situation the wisdom tooth starts the problem and the muscles carry it on. Clenching and grinding have their own long list of causes as well, so it is worth reading our pieces on how clenching and grinding relate to headaches and on bruxism in adults if that sounds familiar.
Signs that point toward a dental cause
No single symptom proves a wisdom tooth is involved, but some features make it more likely:
- the ache is on one side and sits around the jaw angle, ear or temple
- it builds with chewing or opening wide
- the gum behind the last molar is puffy, tender or bleeds
- there is a bad taste or smell from the back of the mouth
- the jaw feels stiff or will not open as far as usual
Migraine usually behaves differently. It often comes with nausea, sensitivity to light or sound, and in some people a visual aura, and it does not normally change with biting. A typical tension headache is felt as a tight band around the head and is often tied to stress, posture or neck strain. Headaches can also have more than one cause at once, so a sore wisdom tooth does not rule out migraine, and the reverse is also true.
An X-ray shows what the gum hides
The parts of a wisdom tooth that cause trouble are often out of sight. A dentist will look at the gum and the bite, feel the jaw muscles and joint, and usually take an OPG, a panoramic X-ray that shows all the teeth and both sides of the jaw on one image. Where a tooth sits close to the nerve canal in the lower jaw, a 3D scan may be suggested before any decision about removal.
The images help answer practical questions. Is the tooth tilted into the molar in front of it? Is there decay or bone loss where the two meet? Is it still coming through on a normal path, only slowly? Depending on the answers, the options may be to keep watching, to treat a flare of gum inflammation, or to plan removal. Our article on when monitoring wisdom teeth is reasonable covers the first of these. If removal is on the table, we also have guides to the anaesthetic and sedation choices and the usual recovery timeline.
Swelling, fever or a locked jaw should not wait
An infection around a wisdom tooth can spread into the tissues of the face and neck. Facial swelling that is getting bigger, fever, difficulty opening the mouth, or any trouble swallowing or breathing needs same-day attention, and difficulty breathing or swallowing is a reason to go to an emergency department. A headache that is sudden and severe, or comes with confusion, weakness or a stiff neck, is a medical matter and needs urgent medical care, whatever the state of the teeth.
At the other end of the scale, if headaches have been a long-running pattern with no jaw, gum or tooth symptoms at all, a GP is the better first stop.
Common questions
Can a wisdom tooth give me a headache even if the tooth itself does not hurt?
It can. Some people notice jaw tightness or a temple ache first, especially when clenching is involved, and only later feel soreness at the back of the mouth.
Will taking the tooth out fix my headaches?
If the wisdom tooth is a real contributor, treating it may ease the headaches. When there are other causes as well, such as grinding habits or migraine, those may need their own management, so removal is not a guaranteed cure.
Why do the headaches come and go?
Gum inflammation around a partly erupted tooth tends to flare and settle, often in step with cleaning, food trapping and general health, so the symptoms can be patchy for months before a pattern is obvious.
If you are getting one-sided jaw or temple headaches and suspect a wisdom tooth, an examination and X-ray can usually tell you whether the teeth are involved. Our general dentists in Melrose Park can check and explain the options, and you can see what is currently on offer on our current deals page.
