Why Your Teeth Keep Turning Yellow After Whitening
Whitening lightens your natural tooth colour, but it doesn't stop new stains from forming or change how your teeth age. If your smile looks yellow again a few months after treatment, that's usually one of eight identifiable causes, not a sign the whitening failed. Here's what actually causes teeth to yellow again, and what helps and what doesn't. 1. Staining Foods and Drinks Tea, coffee, red wine, dark soft drinks, berries, tomato-based sauces, and strongly coloured spices all contain pigments that attach to the tooth surface over time. This is the most common reason whitened teeth look duller within a few months. What helps • Rinse with water right after staining foods or drinks. • Brush and floss on a consistent schedule, not just when you remember. • Cut back on frequent exposure to heavily pigmented drinks. • Ask your dentist about a maintenance or touch-up plan suited to your habits. 2. Smoking and Tobacco Use Tobacco leaves yellow to brown stains that return e...