Intrinsic Stains

• Stains within your tooth enamel are known as intrinsic stains. These stains might be there even before your teeth come out when you're a kid.

  Factors like using antibiotics, having too much fluoride exposure, and your tooth enamel getting thinner with age can cause intrinsic staining. In some cases, it might even run in the family.

Extrinsic stains

• Extrinsic stains are on the surface of your tooth. They occur because of exposure to things in the environment that can discolor your tooth enamel. Things like coffee, artificial food colorings, and smoking can lead to this type of staining.

  Similar to intrinsic stains, antibiotic use may also be associated with extrinsic stains, as suggested by the 2014 research mentioned earlier.