A toothache is information. Here is how to read it, what helps tonight, and when it needs a same-day call.
A toothache that lingers after hot or cold, throbs at night, or hurts on biting usually means the tooth's nerve or root is involved and needs prompt care. Family Dental Care Missouri offers a $99 emergency exam with X-rays at 1010 Walnut St, Suite 280, downtown Kansas City. Call (816) 439-7715.
Reviewed by Dr. Navkiran Warya, DDS - August 2026
Reading the painTeeth have a limited vocabulary, but they use it consistently. The pattern of a toothache, what sets it off, how long it lingers, whether biting matters, narrows the cause considerably before you ever reach the chair, and it decides how urgently you should call.
| The pain | Commonly means | Urgency |
|---|---|---|
| Sharp zing with cold or sweet, gone in seconds | Sensitivity or early decay | Book an exam soon |
| Pain lingering after hot or cold | Inflamed nerve - often root canal territory | Within days |
| Pain on biting or releasing | A crack, a failing filling, or root infection | Within days |
| Constant throbbing, worse at night | Infected nerve or abscess | Same day - call |
| Ache with gum swelling or bad taste | Draining abscess or gum infection | Same day - call |
| Dull ache in several teeth, worse mornings | Grinding or clenching - see night guards | Book an exam |
The most dangerous toothache is the one that stops. Nerve pain that fades after days or weeks of aching often means the nerve has died rather than healed, and the infection it leaves behind resurfaces later as an abscess in a tooth that is now harder and more expensive to save. The economics of a toothache are simple and unforgiving: seen early, it is often a filling; seen late, it is root canal treatment and a crown; ignored, it can end in an extraction. The $99 emergency exam exists to put you on the early side of that curve; the emergency page covers what to do today.
Two ordinary reasons. Lying down raises blood pressure in the head slightly, which increases pressure inside an inflamed tooth, and at night there is nothing to distract you from it. A toothache that reliably worsens at night and throbs is a classic sign of an inflamed or infected nerve, which does not settle on its own. It is worth a same-day call rather than another bad night. Call (816) 439-7715.
Unfortunately, often not. When an infected nerve finally dies, the pain can vanish, and it feels like recovery, but the infection is still there and its next appearance is commonly an abscess, with swelling, and a tooth that is now harder to save. Pain that disappears after weeks of aching is a reason to book promptly, not to relax. An X-ray settles what actually happened. Call (816) 439-7715.
You can narrow it, which is why we ask. A short sharp zing with cold that stops immediately suggests sensitivity or early decay; pain that lingers after hot or cold points at the nerve; pain on biting suggests a crack or infection at the root; constant throbbing with swelling suggests an abscess. But the overlap is real, and only an exam and X-ray can confirm, so treat this as triage, not diagnosis. Call (816) 439-7715.
Over-the-counter pain relief taken exactly as the label directs, a cold compress on the outside of the cheek for ten minutes at a time, and keeping heat, very cold food and chewing away from that side. Do not put aspirin on the gum, it burns the tissue, and be careful with numbing gels beyond their directions. These measures buy comfort, not a cure, so keep the appointment even if the edge comes off. Call (816) 439-7715.
Our emergency exam is $99, which covers the problem-focused exam and the X-rays needed to find the cause of the pain, and you then hear the honest options and their written costs before anything further is done. If you have dental insurance, the front desk checks your benefits. It is a small, fixed price for replacing a night of guessing with an actual answer. Call (816) 439-7715.