Looks like a really severe case of bumblefoot. Is she limping at all? I'd start treating right away. There are lots of threads on this page about how to treat it. For one that severe, it would definitely need to be lanced and drained.
Thanks for all your help, I found a thread saying to check for coccidiosis as well which she is showing signs of. We have only had the chickens a few weeks and there has been a few problems already .