What is the best medication for sensitive teeth?

Dentist: Sensitive teeth can be from lots of causes. The cause will dictate the treatment and a dentist who personally examines you can determine both the exact cause and the best treatment. Consult with one.

A telephone: Call your Dentist for an examination. At 20 you shouldn't have sensitive teeth. Have your Dentist determine the cause (gum recession, cavities, fractures or abfractures, pernicious habits like grinding/clenching, malocclusion, damage from eating disorder, damage from drug use, systemic disease, neurological impairment, etc.) Once cause is determined, proper treatment can be administered.