I took some blood tests 2 days ago and it didn't hurt at all when the nurse was taking blood... in fact, it was the least painful blood taking experience I had ever had. Now, two days later, I have never experienced this much pain in my vein. The vein he used is at the surface of my skin, dark blue green and VERY sore, especially to the touch. What the heck does that mean? I have had blood taken out a million times but nothing like this! :S