In some cases, the lines are active (i.e. present on contraction), though they can also be static (i.e. present at rest), appearing below and/or above the lips. However, treatment is very effective and quite simple.
Botox can be used in isolation, or in conjunction with Dermal fillers, which are injected into perioral area to plump out and smooth the lines. The effects are immediate and will last for several months.