teeth sensitivity is a result of loss of outer most layer(enamel) of teeth.. here are few steps to avoid sensitivity of teeth.. - practice good oral hygiene. - use a sensitivity toothpaste like sensodyne. - don't brush too hard. - use a soft toothbrush. - control acidic foods intake - use fluoridated dental products.. - avoid grinding your teeth.you can use mouth guard for it.. if you have sensitivity in only one or two teeth then you can go for a cap for that tooth..which is permanent solution..

Sensitivity is warning for attention of your teeth. Do get a appointment with a dentist and make sure, it's resolved. Tc!