In most cases, teeth sensitivity rarely increases as a result of whitening with the MAGIC SMILE system. Our bleaching gels are formulated with special components to reduce sensitivity. At the conclusion of the procedure, Magic Minerals gel is applied to strengthen the enamel and reduce the risk of hypersensitivity. However, it's important to note that hypersensitivity might occur when using the Maximum Protocol. Additionally, teeth sensitivity may increase during menstrual cycles. Therefore, it's essential to consider these factors when selecting a whitening protocol and consulting with the patient.