go to somebody's head

Then Michael sat up, one hand going to his head.

Work hard and don't let early success go to your head.

That kind of power could go to a man's head.

I'll try not to let it go to my head.

I know how it can go to a man's head.

That sort of thing could go to a man's head.

I don't think any of this is going to his head.

But he's not going to let it go to his head.

"Can I tell you something without it going to your head?"

Besides, she hadn't been such a bad girl before the power went to her head.