Describe the onset and nature of sensitivity and any measures already tried, then contact smileactives support asking for clinical guidance and whether a reduced-application schedule or a gentler formula might help. Request product alternatives or a trial of a milder option and ask the team to outline safe usage steps tailored to your situation. Framing the request as a desire for continued use with professional guidance typically results in helpful recommendations and often an approved product swap or usage plan rather than an immediate return.