The bump under the eye area can be too much product or a superficial skin infection. I would advise you to return to the treating physician to make sure you are treated properly. If it a lump from the product a small amount of Hyaluronidase can be injected into the area to treat it.
You should return to your doctor for assessment. It is possible that the nodule is filler, which may be massaged or dissolved, but inflammation or infection should be ruled out.
Massaging the area could soften the nodule or injecting a very small amount of hyaluronidase to break up the product would help, in time the bump will fade away
Without IN PESON examination, I can only guess it is a residual HA nodule. In time these usually resolve or try HAudaise injections..