I started getting lip fillers in 2005 and it developed a migratory "log" -a firm ridge of filler - behind my top lips. One side looked fine, but the other moved like a stiff bar and lacked soft natural animation when I spoke. Eventually tried hyaluronidaise to try and correct JUST the one side. I ended up with an empty pocket that now appears as a bubble and overtime trying to balance and fix it's become a mess. Also I have chronic swelling in the floppy pocket. Nightmare.