A It is extraordinarily rare when someone becomes sensitized to hyaluronic acid fillers, but it can happen. The tell-tale sign is redness, itching, swelling, and induration (hives). You have the all the symptoms of an allergic reaction. There are other solutions for facial rejuvenation though. You could consider non-chemical options such as Pelleve radio frequency, or photofacials for lighter, brighter and tighter skin. You too could be tested for use of Sculptra instead. I like to recommend dietary sources of collagen aslo in powder or capsule form. It is always a good idea to listen to the body and respect it's limits.