While the longevity of lip filler can vary, they typically last between 6-18 months. This largely depends on the type of filler that is used, your age, and certain lifestyle factors (such as sun exposure and if you smoke). For example, younger clients typically metabolize dermal fillers faster as their overall metabolism is higher than someone that is older. This means that if you’re under the age of 40, you should expect to need more regular touch ups than someone who is in a higher age bracket.  You can also opt to get additional lip filler injected as soon as your lips have fully recovered from your initial treatment, though most professional recommend waiting at least 3 months before doing so.