What is this lump under my eye years after Restylane in tear trough? (Photo)

I am sorry that you are having an ongoing issue.  It is difficult to say exactly what is causing your problem.  It could be persistent Restylane or could even represent a reaction to the Restylane.  I would recommend seeing a specialist who is highly experienced in dealing with complications and side effects of dermal fillers such as Restylane.   Best of luck.

I suggest biopsy of this are to ensure no infection or granuloma.  Injections, lasers, and surgery can remove this.  Best, Dr. Emer.

Nodules that persist after dissolving of hyaluronic acid filler by hyaluronidase may by foreign body granulomas or tissue reactions by the body that create a scar like bump.  Granulomas are treated first with direct injection of steroid solutions to shrink them; occasionally, a regimen with oral antibiotic or other anti-inflammatory medications may be used.  Seek consultation with an expert in facial injections for possible steroid injection, antibiotic regimen, or possible surgical excision if all else fails.