I've been cut many times at work but this time was different. Basically a pointed spring's edge ran across the area just inside my left thumb, the whole thing is three inches long but only two inches is bad. The skin can be pulled apart and it reveals a greyish-blue layer with miniscule traces of small red veins of sorts I guess. I soaked the entire wound with antiseptic spray and covered with sterile gauze then wrapped it. I don't know if the blue layer was the second layer down or if it was actually tendon, I'm purposely avoiding bending my thumb or putting any strain on the area to let it heal. Am I right with my assumptions on what it was, and if seeing it is a really bad thing. The cut itself wasn't that deep at all ... but it's not something I've seen before so it has me weirded out.