What is the direct answer?
Bicarbonate of soda can remove some surface stain by mild abrasion, but it does not bleach the tooth or change its internal colour.
What does this question mean?
Tooth whitening changes colour mainly through peroxide-based materials that break down stain molecules within enamel and dentine; bicarbonate mainly polishes the outer surface.
What can you do next?
Using a loose powder or abrasive mixture too often can wear enamel or expose dentine, especially with forceful brushing or acidic erosion.
Frequently asked questions
Can home care cure the underlying problem?
Home care can reduce irritation and symptoms, but decay, infection, cracks, and persistent lesions need diagnosis and treatment.
What information should I bring?
Note when it began, what triggers it, where it is, what makes it better or worse, and any swelling, bleeding, trauma, or medicines.

