Hi and thank you for your question! Swelling is very common after Kybella as it induces inflammation in the treated areas. Most of the swelling is expected to resolve within 2 weeks after injection, but in you case if you do not want to take any risks and the event is 3 weeks after the 2nd round, you can always postpone the 2nd round to after the event so that you will have peace of mind. I hope it helps and good luck!
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