@russell.r.sage I know this is an old thread but any update on your recovery ? Currently dealing with something similar and of all the searching I have done your situation sounded most like my own. Appears like swelling on my right sit bone area but is not painful.
As I looked into it I thought I may have Ischial Bursitis but I am convinced its not that. The affected area is not hard its soft to touch like fluid or swelling would be.
I am currently starting my second week off the bike to see if it settles with some time off the saddle. It may have reduced slightly with rest but as it is subtle to look at visually its hard to tell. It definitely hasn’t gone away and to be honest I don’t predict that its going to. As its not painful I am debating if I should just carry on riding. I have an ultra sound booked in two weeks time just to get it checked out but I am finding it hard being off the bike. Any help / advice would be greatly appreciated.