The lip plumpers of today don't seem to have anything on the OG ones from way back in the "exclusively on Sephora" days. Girls literally complain about the tingle of a lip product called lip VENOM. Seriously, what did you expect? Aside from that, that's the only real way I can tell a product is working. Does it tingle my lips? Check..we good, then. It's not even a heavy tingle....it's moderate, but the results are 100% worth any slight discomfort you may experience in the first couple of mins.