While teeth whitening can enhance your smile, there are some potential drawbacks. Teeth sensitivity is a common temporary side effect, with some individuals experiencing discomfort during and after the procedure. Overusing or misusing at-home whitening products can lead to uneven results, tooth sensitivity, or damage to the enamel. Additionally, teeth whitening might not be as effective on certain types of discoloration, such as intrinsic stains caused by internal factors. Having realistic expectations is important, as results can vary based on individual factors like the initial shade of your teeth and your overall oral health. Consulting with a dentist beforehand can help address these concerns and ensure a safe, successful experience.