I had an apparently " allergic" reaction to Ovita ( a hyaluronic acid facial filler similar to juvenesse etc) after a one time injection to the cheeks to treat nasiolabial lines... My face swelled up so badly I could not open my eyes. I am not clear whether this was due to how the doctor injected Ovita into my cheeks or if I am allergic to the filler itself. Or perhaps a combination of these...