Do fillers migrate but never fully go away?

When fillers are injected by a board-certified doctor who has extensive training in the treatment, they will not migrate. Hyaluronic acid fillers, which are the most common, contain hyaluronic acid that dissolves over time. The fillers do not remain in the dermal structure, which is why you must repeat your treatments at regular intervals to maintain your results. Regular use of these products does not lead to skin sagging when performed properly. Make sure you are working with a qualified injector and these risks will not be a concern. 

Thank you for your question, botox results last up to 3 to 4 months and can be softened with Venus Legacy and Thermage treatments. I recommend getting a formal evaluation with a cosmetic dermatologist. Best, Dr. Emer

Fillers should not migrate downwards after injection due to gravity.  Therefore you should not be worried about jowling and sagging if you use a board certified plastic surgeon or dermatologist for injection.   If aggressive massage is performed in the first few days following injection, sagging may be possible.Hyaluronic acid gel fillers such as Restylane, Juvederm, etc. will dissolve over time; that's the reason for having to time your injections at the midpoint of their duration, which varies from one filler to another.