A 'lip flip' is a nonsurgical cosmetic procedure that uses injectable relaxers such as BOTOX to soften the muscles around the lip. While the treatment may create the appearance of a fuller upper lip by making more of the lip visible when smiling, more often patients seek out a lip flip to reduce the look of a 'gummy smile'. A lip flip can be performed in-office in just a few minutes with no recovery or downtime. Not everyone is a candidate for a lip flip, and the procedure yields temporary results that last about three months. For a permanent outcome, patients should consider a lip lift procedure.