Well, from the picture, it appears that the left periorbital region has some redness and swelling.
Post fillers, there may be a reactive swelling due to the "absorption" of fluids by the filler, this is benign and tends to subside over a few days.
If there is an obvious lump felt, then it may be a superficial placement of the filler which made the initial swelling a little more pronounced. Do see your doctor to address this problem, the use of hyaluronidase (melting) can be considered.
The main concern would of course be infection. As long as reasonable cleaning with alcohol AND chlorhexidine was done, the risk is minimal. This is most likely if the area of swelling is also warm and mildly painful.
