I received 4 syringes. I had the crease near my forehead between my eyes and creases around my mouth and my cheek bones done. Everything was fine until day 2 and 3 when my face swelled up so bad (I thought OMG what have I done). I couldn't go out anywhere. However, on day 3 I left for Florida and just hoped that I did not run into anyone I knew. I kept applying cold compresses to reduce the swelling. By day 4 the swelling was receding and by day 5 I looked normal.
The results are great. So don't panic give it 5-7 days...and you'll love the results.