Tear trough filler dent and bruising after 1 year. (Photo)

The staining is difficult to see on the pictures.
The dent is more discernible. This may  be a bit of retracted scar tissue (if you had a heamatoma) or reaction to the filler.
It can be filled again with some low viscosity filler superficially.
The shadowing obscures the lower lid margin so difficult to see if the orbital fat is prolapsing.
Have it assessed by a PS that does lower lid surgery too.

Although it is difficult to say exactly fromyour photos there is hope to expedite this problem. it would be helpful to knowwhat product was used. There are enzymes that can help deflate any remainingfiller or possibly adding filler to "camouflage" the dent. Tattoolasers with a 524 wavelength have been used successfully to eliminatehemosiderin staining which otherwise takes amply time to dissipate 

I was injecting tear troughs on Friday and was discussing the the injections need to be deep.  This help prevent this.