What does it mean when your blood is thick and dark?
This is known as hypercoagulability. A number of factors can cause thick blood, such as: excess blood cells in circulation.
Only while using glucometer blood is drawn from fingers
Excessive bleeding can happen if you cut a vein in your arm
No it is not common however, one may get it hematoma after blood work
No, hepatitis C is not a part of routine blood test