Slim chance that your facial swelling is due to kidney issues, that's usually one of the last places to bloat up and you'd be experiencing a bunch of other symptoms.
For whatever reason, this is just how you respond to juice--or at least your current cycle. Switch the drugs up and see what happens.
Just like some are able to run plenty of juice and still have a lean face, others will get moonface even on low amounts. Genetics, plain and simple...you might not be one of the lucky ones