Hello.. Yellow stains may be calculus, fluorosis, or tea, coffee, betal stains and many..
I advice you to do scaling now.. And do it again after three months..
Later you can do scaling once a year..
If it is calculus, tea, coffee,betal stains means, scaling is enough..
In case the yellow stain is due to fluorosis, bleaching of teeth has to be done..
Follow up with a intraoral clinical picture..
Health Tips
do flossing
brush your upper teeth top to bottom... lower teeth, bottom to top..
use interdental brushing
use mouth wash..