Small Painless Bumps in Bad Wrist

I was diagnosed with carpal tunnel in my left wrist about two months ago after four years of pain. The doctors did an EMG test, but it didn't return any results. So they decided to do a cortisone injection. The pain was gone for about the first month, but I'm starting to feel pain again. I play viola for a few orchestras, so it makes practicing painful. The veins going into my hand have been bright purple for a few weeks now, where in my other wrist you can barely make them out. I also noticed at rehearsal yesterday that when I bend my wrist back, there are two small bumps on the left side. They haven't caused me any pain, but I'm still concerned. Any clue what these may be? It's rather expensive to go to my doctor, so if I'd to do all possible research by myself first. Thanks for the help, if I left out any detail let me know.