I can build a mean brick patio and retaining wall - spent the majority of my high school, college and some of my post-college life doing just that. One day, about 7 years ago, I was chiseling a block in half using a chisel and a large hammer. I was making good progress and got a little too confident, came down hard with the hammer and instead of hitting the chisel came down on the hard, boney area right below where your thumb and index finger make the V. Hurt - a lot - but I put some ice on it - it stayed swollen for a long time, but I didn't have insurance and needed to keep working, so... Still gives me problem to this day. I feel like I have the hands of a 55-60 year old and I'm only 28. Nice little scar there. Hand is structurally fine, but I can still feel it. GO TO THE DOCTOR! I also feel like the constant vibrations from chiseling with a hammer permanently screwed up my hands. Anything that involves tightly gripping an object for any extended period can lead to painful stiffness and even results in me having to pry my fingers fully open... ...maybe I should go to the doctor...