It sounds to me like you may well have an intolerance to hyaluronic acid as persitant swelling is just not a normal reaction, especially on more than one occasion. I would avoid such treatments in the future as if this is the case then it will not matter how much or how little is injected
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Posted to Hyaluronidase - my Experience with Filler and Hylauronidase on 21 Jul 2011