Swollen Upper Lip - Zoom Whitening Side Effect?

It is possible that the heat from the ZOOM lamp caused the equivalent of a sunburn on your upper lip.  The likelihood of it being an allergic reaction to the whitening gel is nearly impossible, since whitening gels are peroxides and the human body itself manufacturers peroxides on a daily basis (sometimes, 10x more than the amount of peroxides in whitening gels).  If your clinician placed a latex barrier over your lips, perhaps it is an allergic reaction to latex.  This... more

If the bleaching agent leaks around the gel that is put there to block it, then it could cause the swelling. Fortunately, if it is caught early, it should only be temporary and last a few minutes. If it has been a couple days, then apparently they left it on too long. It could also be the heat from the lamp but that usually is not the problem. Advil, benadryl and lots of water both internally and topically should help especially if caught early.

There are RARE unusual reactions to all medical procedures and medications. The human body is still 90 % a mystery.  You might ask your dentist about prescribing Medrol Dose Pack if the swelling is significant.