I do have poultry cell here and will check out the other item mentioned. Thank you so much! I may be back for more help.
I forgot to tell you the black stuff you put an arrow on in the pic is just some thin dirt wedged in there. It wasn’t packed or anything.
I very much agree with @aart to clean that out. You may find that is the source of the swelling on the other side. Those nooks/crannies can accumulate quite a bit of crud that festers in there.Might want to clean it out and take a close look, those packed folds could get infected and/or cause the swelling you are seeing on the other side of it.
There was another thread on this previously.
For example look at this thread and the photos in the following link, looking at the top of the foot you would think Bumblefoot infection, but turned out being a debris/poop ball that was packed in there pushing it out.
https://www.backyardchickens.com/threads/bumble-foot.1292460/