Hello, and sorry to hear about the negative side effects you experienced. In general, the side effects of Dysport can include the following:
1) Light bruising
4) Temporary ptosis (drooping of the brow or eyelid)
The issue you describe is likely due to swelling from the product, but only an exam can tell. I would recommend following up with your provider so they can examine the area and make sure everything is alright. I hope this helps, and I wish you the best of luck.