Can you advise on under eye filler swelling 7 years later? (Photos)

I'm sorry to hear of the issues you are having with swelling. I think you are taking the correct steps by dissolving any remaining filler and seeing an allergist. An ENT may be another specialist you can consult if you do not find improvement with the current plan.

I’m so sorry you’re going through this. You need to see an oculoplastic surgeon ASAP. It is possible this is a delayed reaction to HA filler, also possible you received a non-HA filler but most concerning is the marked swelling and cellulitis you have and we have to rule out things like a nasolacrimal duct obstruction. Imaging like a CT scan should be considered that will be able to show foreign material as well as any orbital or lacrimal process going on. I hope you get better soon.