How do i get rid of stains that are in a hole in my teeth?

Dental Prophylaxis: A dental hygienist is best for dental stain removal. If the stain can't be removed by her professional methods, it is likely a cavity.

See a dentist: A hole in a tooth is an area that will easily trap food particles, has been difficult for you to clean (as shown by the inclusion of stain), and ultimately will develop decay. Any hole or defect in the tooth should be restored or if without decay, should be sealed to prevent a future cavity. Bacteria cause decay, bacteria are small, your hole is the "grand canyon" to the bacteria.