Regards, Liquid silicone is unsafe, please do not use it ever. The autoimmune response could be triggered by this substance, if you look around on the Internet, you will find patients that have a lot of problems with this product. The use for lips and other areas is off label. The inical use is for retine problems. Biopolymers should not be injected into the face or the body, what was injected into your face is presenting inflammatory complications, for this reason the increase in volume, which is known as edema, and you may present nodules, hardening and degeneration of the tissues. Please remember to be aware, do not let any permanenrt filler to be injected into your face, breast, buttocks, calfs, genitalia, etc. The safest way to increase buttocks is through your own fat injections or through silicone implants. I hope the information was usefull, have a nice day! Dr Carlos Alberto Ríos.