Are there any pre or post treatments for desensitizing?

When applied as directed, GLO Science Professional whitening technology results in minimal to no treatment sensitivity so there is rarely a reason to pre-treat for sensitivity. The gentle, controlled warming heat of the closed-system mouthpiece prevents dehydration of the teeth, a common cause of sensitivity. In addition, the whitening gel formula is specially formulated with potassium nitrate which acts as a protective barrier and desensitizing agent. That said, if your gums are especially prone to sensitivity, be sure to apply the GLO Lip Care to the gum area as well as to your lips prior to whitening. This will create an additional barrier to protect the gums from any sensitivity.