A toothache shows up as pain or sensitivity in or around a tooth that doesn’t go away on its own within a day or two. It can feel sharp, dull, or throbbing depending on the cause, and roughly 41% of adults report experiencing some degree of dental pain in any given six-month period. Knowing what type of pain you’re dealing with helps you figure out how urgent it is and what’s likely going on.
What the Pain Feels Like Matters
Not all tooth pain is the same, and the character of the sensation points toward different problems. A sharp or stabbing pain, especially one triggered by biting into food or drinking something cold, often signals a cavity that has reached the deeper layers of the tooth, a cracked tooth, or a loose filling. It tends to come and go, flaring up with specific triggers.
A throbbing or pulsing pain is more concerning. This type of pain often indicates an abscess, which is a bacterial infection at the root of the tooth that causes swelling and pus buildup. Throbbing pain can radiate into your jaw, ear, or temple and may keep you up at night. It rarely improves without treatment.
A dull, persistent ache is the most ambiguous. It can come from early-stage decay, teeth grinding (bruxism), or even sinus congestion pressing on your upper teeth. If it’s been present for more than a few days and isn’t tied to a cold or allergy flare-up, it’s worth investigating.
The Sensitivity Test You Can Do Yourself
One of the clearest signs of a toothache is how your teeth respond to temperature. Take a sip of cold water or hold something warm against the tooth and pay attention to two things: whether it hurts, and how long the sensation lasts.
If the sensitivity to cold or sweets fades within a second or two, the nerve inside your tooth is likely irritated but still healthy. This is called reversible pulpitis, and it can often be fixed with a filling or other minor treatment. But if sensitivity to heat or cold lingers for more than a few seconds after you remove the trigger, that’s the main sign the nerve damage has progressed to the point where it won’t heal on its own. A tooth that doesn’t respond to temperature at all may have nerve tissue that has already died, which also needs treatment even though it may not hurt much in the moment.
Pain When You Bite or Chew
If you feel a sharp jolt when biting down on food, the most common causes are decay, a loose filling, or a crack in the tooth. You can narrow this down with a simple test: try biting on different parts of the tooth one at a time using something firm but not too hard, like a cotton roll or a wooden chopstick. If pain spikes when pressure hits one specific spot, a crack in that area is likely. Pain that’s more generalized across the whole tooth when you chew points more toward decay or an issue deeper in the root.
You can also gently tap on the biting edge of a tooth with the back of a spoon. If tapping produces a distinct ache or sharp pain, there’s likely inflammation around the root.
Visual Signs to Look For
Open your mouth in front of a mirror with good lighting and check for a few things. Gums that are red, swollen, or tender around a specific tooth suggest infection or gum disease. Healthy gums sit snugly against the teeth and look pink. If your gums have pulled away from a tooth, making it look longer than its neighbors, that’s a sign of advancing gum disease.
A visible hole or dark spot on a tooth is an obvious indicator of decay. You might also notice a small pimple-like bump on the gum near the root of a tooth. This is often a fistula, where pus from an abscess is draining. A persistent bad taste in your mouth or bad breath that doesn’t improve with brushing can also point to a deep cavity or abscess that you can’t see.
When It Might Not Be a Tooth Problem
Pain in your upper teeth doesn’t always start in your mouth. The maxillary sinuses sit directly above the roots of your upper back teeth, and when those sinuses are inflamed from a cold, allergies, or a sinus infection, the pressure can make several upper teeth ache at once. The key difference: a true toothache is generally isolated to one or two teeth, while sinus-related dental pain tends to affect multiple upper teeth and gets worse when you bend over or change head position.
Teeth grinding is another common source of dental pain that gets mistaken for a toothache. If you wake up with a dull ache and pressure across your upper or lower jaw, especially on both sides, bruxism is a likely cause. Your partner may have noticed you grinding at night, or your dentist may spot wear patterns on your teeth.
Signs That Need Immediate Attention
Most toothaches warrant a dental visit within a few days, but certain symptoms signal something more dangerous. Swelling in your face or jaw that’s visibly noticeable from the outside, especially if it’s spreading toward your eye or down under your chin, can indicate an infection that’s moving into deeper tissues. A fever above 102°F alongside tooth pain suggests the infection may be entering your bloodstream.
Difficulty swallowing or breathing with jaw swelling is a medical emergency. This combination can indicate a condition called Ludwig’s angina, where infection spreads to the floor of the mouth and threatens the airway. This is rare, but it requires emergency room care rather than a dental office visit.
Uncontrolled bleeding from the gums or tooth socket, pain so severe that over-the-counter medication doesn’t touch it, or a tooth that’s been knocked out are also situations that call for same-day care.
Putting the Clues Together
A toothache rarely shows up as just one symptom. You’re usually dealing with a combination: pain plus sensitivity, or swelling plus a bad taste, or aching plus visible gum changes. The more of these signs you notice concentrated around one tooth, the more likely you’re dealing with a genuine dental problem rather than referred pain from somewhere else. Pain that wakes you up at night, gets progressively worse over days, or responds to heat but not cold is telling you the problem is advancing and needs professional evaluation sooner rather than later.