Will "v" shaped lines on forehead after Dysport treatment go away?

It can take 1-2 weeks to see the full effect from a Dysport treatment and it is possible that there would still be some mild swelling one day after the injection. Without examining you, it is difficult to say what might be causing the V lines that you see on your forehead, but I would wait a couple of weeks to see if it changes with time.  If you feel there is still an issue after two weeks, I would contact the physician who treated you.  

It takes up to two weeks for you to see your final results from your Dysport treatment. If after this time you still have concerns return to your injector for an evaluation.

Hello and thank you for your question!  The results of your dysport will become noticeable 3-7 days post injection.  After day 14, I would recommend a follow-up with your board certified injector for any necessary touch up.  I hope this information helps and best of luck to you!