4. Ask your dentist about a paint job
If you’re not having much luck with a desensitizing toothpaste, talk to your dentist about painted-on barriers. Desensitizing agents like fluoride varnish or even plastic resins can be applied to the sensitive areas of your teeth. They wear off over time—a few months to a couple of years, depending on what material is used—so they’ll need to be reapplied.