Thank you for your question about Kybella. Kybella is FDA approved for treating submental fullness, and as far as I am aware there have not been any links to cancer, autoimmune diseases, etc. A few of the more severe risks with Kybella is nerve injury resulting in paralysis or uneven smile (all reported cases resolved with no permanent damage) or infection. Other symptoms that are more common would be pain, bruising, swelling, and numbness. Kybella is amazing and our patients have had great results. Kybella works great at dissolving fat as well as offering mild skin tightening as well. To be sure, see two or more experienced, licensed and board-certified providers in your area for a complete evaluation to make sure you are a good candidate and that it is safe for you to have treatment. I hope this helps