Used as an example to show anger, annoyance or aggravation. This expression is growing in popularity in London and the South East of England. Derived from the expression "a throbbing vein".
"I hate this song it really gives me a vein"
"He can be alright but today he's being a bit of a vein"
"All this work is giving me a vein"
"I'm not alright I have an intense vein"