An earache that your GP cannot explain is sometimes coming from your mouth. A decayed lower molar, an inflamed wisdom tooth or an overworked jaw joint can all be felt as pain in or around the ear, even when the ear itself is perfectly healthy. Doctors call this secondary or referred ear pain, and dental and jaw problems are among its most common causes.
Ear pain comes in two kinds
Medical guides divide ear pain into primary pain, which starts in the ear, and secondary pain, which is referred from somewhere else. A 2026 review by Kasper and Quinlan in American Family Physician lists middle and outer ear infections and blocked eustachian tubes as the usual primary causes, and names jaw joint disorders, dental problems and neck problems as common sources of referred ear pain.
The reason is shared wiring. The back teeth, the jaw joint and parts of the ear all send their sensations through branches of the trigeminal nerve, the main sensory nerve of the face. When signals from several places travel along the same routes, the brain is not always good at telling where they began. A sore molar on the lower left can therefore register as an ache deep in the left ear. The same overlap explains why it can be hard to tell which tooth is hurting, as our article on pinpointing a painful tooth explains.
Dental and jaw problems that are felt in the ear
Deep decay or an abscess in a back tooth
When decay reaches the nerve of a molar, or an infection forms at the root tip, the pain can spread along the jaw towards the ear on the same side. It is often worse at night or when lying down, which our guide to toothache at night covers.
A wisdom tooth that is partly through the gum
Lower wisdom teeth sit at the angle of the jaw, close to the ear. Food and bacteria can collect under the flap of gum over a partly erupted wisdom tooth, causing a painful infection called pericoronitis. Along with ear pain there may be swelling, a bad taste and difficulty opening wide. Our article on wisdom tooth gum infection has more detail.
The jaw joint and chewing muscles
The temporomandibular joint sits just in front of the ear canal, so strain or inflammation there is very easy to mistake for an ear problem. Clenching or grinding, often during sleep, tires the large chewing muscles at the side of the face and can leave a dull ache by the ear that is worse in the morning. Our article on jaw joint pain looks at causes and treatment.
A cracked tooth
A crack in a back tooth may cause a sharp, brief pain when you bite on something or release your bite, and that twinge can be felt towards the ear. These cracks are often invisible to the naked eye; see our guide to cracked tooth syndrome.
Clues that point away from the ear
Some features suggest the ear really is the problem: discharge from the ear, muffled hearing, a blocked or full feeling, and fever, particularly in young children. Pain from a tooth or the jaw usually comes without any of these.
Instead, dental and jaw pain tends to be tied to something you do with your mouth. It may flare when you chew, bite on one side, drink something cold or hot, yawn or open wide. A particular tooth may feel tender when you press on it or tap it. The jaw might click, feel stiff, or ache in front of the ear when you touch it. If your ear pain follows these patterns, a dental cause becomes more likely.
Deciding who to see first
If there is ear discharge, a change in hearing or a fever, start with your GP. If your doctor has examined your ears and found nothing to explain the pain, or a tooth is clearly sensitive, book a dental examination. A dentist can test individual teeth, check the jaw joint and muscles, and take X-rays if needed to look for decay, infection or an impacted tooth. When the picture is mixed, either practitioner can assess you and refer on.
Ear pain that keeps coming back on one side, is severe, or does not settle should always be followed up. The American Family Physician review flags persistent, severe or one-sided symptoms as red flags that call for a closer look for less common and more serious causes, so do not let it drift once teeth and ears have been checked.
A few things people ask
Does fixing the tooth stop the earache?
When a tooth is the true source, treating it usually settles the referred pain too. If the ache continues after treatment, the jaw joint or another cause may also be involved and is worth reassessing.
Can it be both an ear infection and a tooth problem?
It can, although it is less common. If you have symptoms of both, see your GP for the ear and your dentist for the tooth rather than assuming one explains everything.
Getting the source checked
If your ears have been given the all-clear but the ache keeps returning, our team can examine your teeth, gums and jaw joint to look for the cause. Book with a general dentist at Lumi Dental in Melrose Park, and see our current offers for new patients.
Source
This article is general information and not a substitute for personal dental or medical advice.
