What is the direct answer?
Yellow marks between teeth may be plaque, tartar, stain, or exposed dentine, so removal depends on the cause.
What does this question mean?
A mark between teeth may be hardened plaque, food or tobacco pigment, or dentine showing through enamel. A rough or dark area can also be decay.
What can you do next?
Clean between the teeth daily with floss or a correctly sized interdental brush. A professional can remove tartar with scaling and assess polishing, whitening, or restorative treatment.
When should you seek dental care?
Arrange an examination if the mark is rough, bleeds, catches floss, hurts, or remains after careful cleaning.
What should you ask the dentist?
Ask whether the mark is stain, tartar, decay, or exposed dentine, and which interdental cleaner fits that space.
Frequently asked questions
Can baking soda remove it?
Abrasive powders may wear surfaces and cannot remove tartar or decay.
Why does one space bleed?
Local plaque, tartar, trapped food, or a gum pocket may inflame it.

