Unlike veins, arteries have their own pulse and are muscular. Because you would have injured that place and the tissue is sensitive, you're more likely to feel the pulse in that artery near your injury.

NOW I understand why it is only sometimes that I feel my pulse when I injure myself, and many a times I am hardly aware whether I got hurt or not.
(Where did that scratch come from...?)

Are arteries those long blue pipes scrawling all over our bodies? Umn, do you mean to say that these long pipes are actually a sort of muscle?!?

Pin~Jinx / anarchist

the long blue things are veins, which carry the blood back to the heart, and are low-pressue. Arteries carry blood from the heart, and are high pressure, and pulsate with the heart's contractions. With some injuries, blood flow to the injured part is increased; blood flow into an area is from arteries, and if it's increased, pulsation may be felt. Arteries are not muscles, but they have muscles in the wall, which are controlled by the autonomic nervous system, and that allows them to dilate to increase flow, or constrict to decrease flow. When constricted, you'd feel less pulsation; when dilated, as in some types of injury response, you'd feel pulsation.