Fillers in general and lip fillers in particular should not migrate. Aggressive massage can disperse them over a wider area but migration should not happen. FDA approved lip fillers are: Kysse, Juvederm, and Volbella.
Dear Thrifty518249,,if you had lip filler migration it doesn't mean that it will happen again. I perform a lot of lip injections with fillers such as juvederm and it works great. Many times I need to put more in one side than the other to attempt to even out the vermillion border (The red line of the lip). This helps provide more symmetry at times.For patients looking for a more long lasting result, I recommend fat grafting. That is, using your own bodies fat to make your lips naturally look more shapely. The bonus is that the results last many many years.In general, I avoid using permanent prosthesis because I find that the lips are such dynamic and sensitive structures, the end result is not natural.Daniel Barrett, MDCertified, American Board of Plastic SurgeryMember, American Society of Plastic SurgeryMember, American Society of Aesthetic Plastic Surgery