Post by sizzling07 on Dec 1, 2011 6:21:34 GMT -5
Hydrogen peroxide can cause tooth and gum sensitivity, however. If the teeth whitening pen is causing sensitivity, it may be best to skip a day in between treatments, or to switch to a teeth whitening system with a lower concentration of peroxide. The tooth sensitivity is often only temporary, however, and will usually go away within a few days. Teeth whitening pens typically cause less sensitivity than sticky strips or trays for tooth whitening.