Oral Health

The honest answer is a split: the symptom can usually be controlled, often completely, but whether it is fixed permanently depends entirely on the cause. A cracked tooth, decay or a failing filling can be permanently repaired. Gum recession cannot be reversed, so that sensitivity is managed rather than cured.

Cold water triggers a sharp jolt because exposed dentine carries the signal straight to your nerve. But how long the pain lasts after the cold is gone tells you everything: seconds means manageable sensitivity, while lingering, throbbing or heat-triggered pain means the nerve is dying and needs a dentist this week.

There are only two mechanisms that reduce tooth sensitivity: nerve desensitisers like potassium nitrate, and tubule occluders like stannous fluoride. Here is how each one works, what the evidence honestly says, and the pain that no toothpaste will ever fix.

Receded gum tissue does not grow back - no toothpaste, mouthwash, oil pull or supplement regrows it, no matter what the internet claims. What can honestly be done is stop the recession getting worse, manage the exposed-root sensitivity, and where clinically indicated, have a periodontist surgically cover the root with a gum graft.

Sensitive teeth are a symptom, not a diagnosis. Receding gums, acid erosion, a cracked tooth, decay, a failing filling, grinding and gum inflammation each cause sensitivity differently — and each needs a different fix. This guide walks the full differential: what triggers each one, how long the pain lasts, whether it hits one tooth or many, and the one test that tells you when to stop reaching for toothpaste and book a dentist.