Thank you for your question. It is normal to have a small amount of redness following injections of Voluma, but redness does not usually persist for two weeks. It would be best to speak with your injector and discuss your concerns. They will need to know additional information regarding other symptoms you may have had: itching, hives, swelling, pain, etc. to truly know what may have taken place. I am happy to hear that it resolved spontaneously but because Voluma is made of hyaluronic acid (which is present in the body naturally) and because it can last upward of two years, it doesn't sound as if it had been a true allergic reaction, otherwise it should still be happening. Perhaps it was a reaction to a topical numbing medication?