have a rush of blood to the head
have a (sudden) rush of blood to the head
To have a sudden feeling of excitement or anger that causes one to act in unexpected ways. It must have been a sudden rush of blood to the head that made Gary lash out at Ron, because he's usually so calm.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
have a rush of blood to the ˈhead(humorous) because of a strong emotion, suddenly (decide to) do something foolish or dangerous: I don’t really know why I bought that vase. I just had a rush of blood to the head and wrote a cheque.
Farlex Partner Idioms Dictionary © Farlex 2017