Yellow colour of ur teeth can be due to 3 reasons 1.external stains 2.intrinsic stains 3.dentinal colour due to thin enamel For extrinsic stains u can opt for scaling and polishing(cleaning) For intrinsic bleaching, laminates and veneers

If hard calculus is already deposited on your tooth surface first you should go for scaling done then maintain your oral hygiene by yourself. Hard calculus cannot be removed by your own.

U may have calculus accumulated so kindly get scales ng done n learn proper brushing technique too

U need to go for cleaning(scaling)and polishing of teeth that will improve ur teeth colour ...but if still u want more whiter shade u can go for bleaching of teeth

routine scaling and polishing shall make your teeth appear much whiter. the problem is a deposition of calculus on your teeth. calculus is basically food debris that has hardened. it does not come out with normal brushing. consult your dentist every six months to be updated on your dental health. in case you feel that your teeth need to be a little whiter, you can alsp opt for bleaching of your teeth two weeks after getting the scaling and polishing done

Get scaling and polishing done. If you still feel the teeth are yellowish then opt for bleaching. You can opt for Home bleaching system ( where the dentist will give you custom made trays with bleaching material) or an in office bleaching procedure .