The yellow colour of your teeth
may be due to accumulation of soft deposits called plaque
.you have to visit
to a dentist
and get the proper check up done. If the stains are superficial then simple scaling and polishing will make your teeth look much brighter and if something like bleaching
is required that will be advised to you accordingly. Depending on the exact cause of yellowness in your teeth other treatments like veneers
can also be planned which will make your smile look much brighter.