Leg still swelling after GSV ablation - what could cause this? (photos)

A year ago I went hiking and developed bilateral ankle swelling. My left ankle resolved ; however, my right did not. Eventually after seeing a general practitioner and podiatrist, I was referred to a vein surgeon and I had skin discoloration, progressive swelling not corrected by 15-20 mmhg socks, and shiny skin. I had reflux of both my GSV and SSV with filling to a varicose vein. One year after ablation of only the GSV my skin is getting darker and swelling. What could cause this?