Sculptra - question of hematoma vs allergic reaction

Your assessment is valid. I would massage the area twice daily with Plato's Bruise Balm to help smooth out the bruise and possible hematoma. Best, Dr. Karamanoukian Los Angeles

The immediate appearance of this tenderness, swelling and numbness is very suspicious for a hematoma.  This will stay firm for several days, and you may experience some uneven swelling for awhile, but rest assured that hematomas will go away.  They often leave a deep burnished discoloration for a month or more.  It is important in your case to ice a bit more frequently and be very gentle when massaging over this particular area of swelling.  Hematomas and bruising in general are less likely to occur when Sculptra is constantly being pushed out of the needle whenever the needle is moving.  This technique effectively pushes blood vessels out of the way when done in this manner.

This sounds like they hit a nerve or cased bruising, if there is no residual issues then you are fine. I suggest cannula injections in the future to prevent any bruising or swelling.  Best, Dr. Emer.