Thanks for the reply.

No I don't have any head or spine injuries.

I honestly thought this was something benign, similar to what happens with a guitar player. I didn't think 20-30 minute massage could damage nerves, I thought the fingers were more resilient than that. The interesting thing is, When I slide a pointy tipped item over the surface of my
Fingertips, it feels the same as my other fingers, but when I slide a flat surface like my finger nail over them, it feels somewhat less sensitive. What could that mean?

Also I mentioned this problem to a hand specialist and he mentioned "there could be some slight desensitization going on, but I don't think you are doing any damage" He said he hadn't heard of something like that before and because of the layout/anatomy of that part of the finger he couldn't see a compressive neuropathy happening from a massage like that.. He said maybe over the bulk of the nerve at the wrist, but he hadn't heard of it at such an isolated place like the fingertip.

But yeah, im not sure what he meant by there could be some slight desensitization but no damage going on. That's why I asked here..