Y is where I had a greenstick fracture when I was 17. Playing volleyball with a balloon at a friends birthday party. I know, I know . . . it wasn't the balloon itself, but rather the 6'4" guy on the other side who felt the need to spike the balloon at me. Anyway, the area has been thicker than the Left ring finger ever since. It went from being a 6 3/4 ring size to 7 1/4.
If you look at X it is swollen. There is bony enlargement on the middle phalanges bone, just distal (towards the end of the of the finger) to the proximal phalangeal joint.
I am including links in this blog, like I do in most of my blogs, so as to help you understand the anatomy of your body. This helps you communicate with your physicians (especially over the phone) with what parts of your body are problematic at that time.
This started about 3 weeks ago and it doesn't seem to be going away.