Idioms with HEAD

keep your head
to stay calm in a difficult situation
He managed to keep his head during the crisis.

go to your head
to make you believe that you are better than other people
Don’t let success go to your head.

over your head
too difficult for you to understand
The complicated details were over my head.

in over your head
to be involved in a situation that is too difficult to deal with
In business, start small and don’t get in over your head.

put your heads together
to discuss a difficult problem together
We should put our heads together to solve this problem.