What Causes Sensitive Teeth?

1. Thin enamel. Enamel is the hard outer layer of your teeth. It protects them from damage and helps keep them white. But acid can wear down enamel, making your teeth more sensitive. This can be caused by:

- Eating or drinking acidic foods and beverages, such as citrus fruits, soda, and sports drinks

- Brushing your teeth too hard

- Using a toothbrush with hard bristles

- Grinding your teeth

- Having a receding gumline

- Acid reflux

- Dry mouth

2. Exposed dentin. Dentin is the layer of tissue under your enamel. It is softer and more porous than enamel, so it is more sensitive to pain. When enamel is worn away, dentin can become exposed, causing sensitivity.

3. Gum disease. Gum disease is an infection of the gums that can damage the soft tissue and bone around your teeth. This can lead to teeth sensitivity, as well as other symptoms such as bleeding, swelling, and loose teeth.

4. Cavities. Cavities are holes in the teeth caused by bacteria. They can reach the dentin layer and cause sensitivity.

5. Worn dental work. Dental work, such as fillings and crowns, can wear out over time. This can create gaps where food and bacteria can get trapped, irritating your teeth and gums.

6. Smoking. Smoking can damage the enamel and gum tissue, making your teeth more sensitive.

7. Teeth whitening treatments. Teeth whitening treatments can temporarily increase tooth sensitivity. This is usually a mild side effect that goes away within a few days.