Dentinal hypersensitivity satisfies all the criteria to be classified as a true pain syndrome that can be acute, but for our purposes is a chronic condition with acute episodes without the disabling characteristics and severe dysfunction of a chronic pain syndrome. It is estimated that the frequency of dentinal hypersensitivity affects one of six people, and one or more teeth can be affected. The incidence of dentinal hypersensitivity appears to peak around the third decade of life and may appear as root sensitivity in the fifth decade of life as root sensitivity particularly in patients undergoing periodontal surgery. The relationship of dentinal hypersensitivity to acute and chronic pain is shown in Table 1. Dentists' ability to soothe or stop pain has always been their greatest asset in establishing patient rapport. The experience of pain is so subjective that none of us can ever be sure another person is having it. Physicians, dentists, and especially those affiliated with pain centers and clinics have resolved this dilemma in a commonsensical way. They simply treat the pain as if it were real, and their track record in confronting this inscrutable condition has contributed to their high regard as professionals.