I have routinely been treating this very common problem for many years with very gratifying and durable results. Static (at-rest) glabellar "frown lines" of all kinds, be they "eleven lines" or the horizontal line note here, result from two underlying causes, both of which should ideally be treated in order to achieve satisfying and durable results. The underlying cause of these lines is typically the daily repetitive movement of the muscles of expression located there, which we tend to use numerous times each day. Over the years, especially as we enter midlife, the overlying :"fabric" of our skin becomes permanently etched and creased, so that even when the underlying muscles are at rest, the skin continues to show the "frown lines." as is the case here. So, for best and more durable cosmetic improvement, a two-pronged approach is used. Botox can be used to address the movements of the underlying muscles (The intent is not to "freeze" the muscles so that you cannot emote, but rather to diminish their overactivity), and a low viscosity, malleable, cohesive HA filler can be used to elevate and smooth the creases in the "fabric" of the skin. In the hands of an experienced, board certified cosmetic dermatologist filler expert, the very superficially placed injections needed to achieve elevation and smoothing of the etched lines typically poses little risk. Please note: unfortunately, the hard science to promote the use of so-many of today's expensive, here-today-gone tomorrow light and energy-based gizmos, like fraxel lasers, RF devices, etc, lags woefully behind the heavy marketing and social media buzz that hawks them. So, you would be wise to exercise a whole lot of "buyer beware" when being presented with these types of options Hope this helps and best of luck.