I suggest the following home remedies and basic dental care . If this does not work or the condition is chronic then you definitely need to consult a dentist. Or try a cosmetic dental treatment.
*Reduce coffee and red wine intake and reduce smoking. This is common sense and also good for your body.
*Try chewing raw vegetables , once a day . Raw vegetables are a healthy snack and they will also help in cleaning your teeth.
*Strawberries have a natural bleaching effect and are high on Vitamin ‘C’. So have some every day . This is a ‘tasty’ healthy solution to the yellow teeth problem. Of course make sure, you are not allergic to them.
*Floss everyday. Stains form easily between teeth and flossing is an easy solution.
*Brush your teeth everyday, every 12 hours. Do ensue the bristles are not worn out. Change your brush regularly. Old worn out brushes just cannot brush away plaque forming bacteria and are useless.