What are the causes of yellow stains on teeth?

Many: Some fruits, coffee, tea, inadequate brushing to clean them off and a multitude more. This is if the stains were not there originally if they were, they are considered intrinsic and can be impregnated in the enamel. The majority of this is from medication, usually tetracycline, but not always.

Stains: Stains may be caused by: poor oral hygiene, plaque stuck on the teeth can turn yellow, foods and drinks, such as tea, coffee, red wine and colas, plus berries, curry and fried foods, and smoking. There are so many things that cause staining you should ask your dentist at your next visit.