I have those, I was told they are cysts.

Not really tender, I also have one big one on my thumb, and one of each of my ankles.. I am on 7 MTX’s weekly, I know MTX can cause this also.. RA Dr hasn’t seen these new ones.. both my primary and my RA are out of the office until Jan 8th and 11th. Thanks

I get a coursing vascular pain in that spot about an hour after every time I take Methotrexate. It subsides though. Perhaps look at vascular arthritis? Are they tender?