Teens are inundated with images of celebrities with pearly white teeth and seemingly perfect smiles. As a result, many teens have turned to bleaching their teeth to achieve that "perfect" smile. But many simply don't know when to stop.
Over-bleaching can erode the teeth, leaving a transparency on the edges of the teeth and breaking down the tooth's enamel. This makes teeth overly sensitive to hot and cold foods and drinks, and can also make teeth glow under a black light.
Remember that bleaching is temporary and should only be done when following the manufacturers guidelines.