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 Biopolymers cause a severe inflammatory reaction that can cause permanent damage to the tissues, known as Iatrogenic Allogenosis and an Autoimmune Syndrome (A.S.I.A. Syndrome). The risk of having autoimmune diseases and deformities in your face due to tissue damage is very high, then the use of any substance that is permanent is not advised. So, if you want to increase your cheeks, you have to use safe substances that are resorbable like hyaluronic acid; there are brands like Juvederm and Restylane that are qualified, within the Juvederm family, it exists Juvederm Voluma, that has a durability of 2 years approximately. In your case, you would need an MRI and remove the susbstance as soon as possible. In my medical center I developed the technique of resection of biopolymers in face, lips, buttocks and lower back through video endoscopy, a surgery performed with minnimal incissions to treat patients with permanent deformities, secundary to biopolymers injections. Please remember to be aware, do not let any permanenrt filler to be injected into your face, breast, buttocks, calfs, genitalia, etc. I hope the information was usefull, have a nice day! Dr Carlos Alberto Ríos.