The on-and-off pattern is information. What triggers it, how long it lasts and whether it lingers tell me a lot before I ever look.
What the pattern usually means
Sharp, brief pain when you bite or release: often a crack. The tooth flexes under load and the crack opens.
Cold sensitivity that fades in seconds: often exposed root or a leaking filling. Usually treatable without a crown or nerve work.
Cold or hot that lingers for minutes, or aching that comes on by itself: the nerve may be inflamed or dying. This is the one I do not watch.
Soreness that moves around or comes with headaches: often grinding or a high spot in your bite.
What I check at the visit
Most of these take a minute each. Together they usually point to one cause.
- Cold test on the tooth and its neighbors, to see how the nerve responds
- Bite test on each cusp, which finds cracks that X-rays miss
- Percussion, tapping the tooth, which points to inflammation at the root
- X-rays, and a 3D scan when the picture is unclear
- Gum measurements around the tooth, since a gum pocket can mimic a toothache
When we watch, and when we do not
I watch when the tooth responds normally to cold, there is no crack on the bite test, the X-ray is clean, and the pain is mild and explained, often by a high filling we can adjust or a gum pocket we can clean. Watching means a recheck date and clear instructions on what should bring you back sooner.
I do not watch lingering pain, pain that wakes you, swelling, or a crack I can reproduce. Those get treated, because they only move in one direction.
Call today if
We hold same-day time on weekdays. Most emergency exams and X-rays are covered by PPO plans.
- Pain wakes you at night or lingers for minutes after hot or cold
- Any swelling in the gum, cheek or jaw
- A bad taste or a bump on the gum
- Pain on biting that is getting sharper
Tooth that hurts some days and not others?
Call (949) 251-0011 and we will test it rather than guess. What a toothache visit looks like is on our toothache page.
Quick answers
Owner of mend dental in Irvine and a graduate of the University of the Pacific's Dugoni School of Dentistry. Dr. Sison writes and reviews every article for clinical accuracy.
Meet the team →





