Why some persons eye becomes red in color,when they get angry?

HI THEREsreejithsreenivas :))actually not all people experienced or noticed this changing of eye color and not all experienced this also. actually its not the eye..its just a part of the eye..and not the pupil who turns in red (like eyes of edward from the movie twilight/ a normaly color of the eyes of a vampire :D) when some people got mad the blood pressure get high and some people experinced to feelin hot and it cause that some of the veins on our conjunctiva-lining of the eyelids and surface of the eyes ( the white color )turned into red.

some body mechanism is there.....

I think it's because when people get angry their blood pressure goes up, the blood rushes to their head causing many peoples eyes to get red.

i've never actually seen that happen in real life. o.O