Teeth whitening can make a dramatic difference to the colour of your teeth, but over time the discolouration is likely to return. When you understand the reason for the discolouration, you might be able to take action to help your teeth stay whiter between treatments. Here are a few common causes of tooth discolouration.
1. Stains From Food and Drink
Many cases of tooth discolouration are simply caused by eating and drinking strongly coloured foods and beverages, such as red wine and black coffee.