Why teeth become sensitive
Short answer
Sensitivity happens when the layer under the enamel is exposed, often from worn enamel, gum recession, or a cavity.
Simple explanation
Cold, sweets, or brushing can trigger a quick, sharp pain. A dentist can find the cause and often help with fluoride, sensitivity toothpaste, or fixing a cavity.
When this usually matters
Small changes at home can help a lot.
When to seek dental help
Sensitivity that becomes constant, painful, or with a visible cavity means see a dentist.
Questions to ask your dentist
- •Is it sensitivity or a cavity?
- •Which toothbrush and toothpaste should I use?
- •Do I need a filling or fluoride treatment?
This is simple educational information. It is not a diagnosis and does not replace a dental examination. Your dentist may recommend something different depending on your mouth, X-rays, pain, infection, gums, bone, medical history, and clinical judgment.