Best dental clinic in 200 feet radial road. How to Treat Teeth Stain Nobody likes yellow teeth! Tooth discoloration are common occurrences that can happen due to a variety of reasons. Don’t worry! These stains are treatable and preventable. Most Common Causes of Yellow Teeth Persistent stains from drinking coffee, tea and red wine develop over years and often leave your smile looking dull and discoloured. However, they are not the only culprits for stained teeth.