Where did the phrase 'It's doing my head in!' Come from?

[PeatrixBotter]

I can't find out via the Internet. I've never understood this phrase and after hearing a lot of other people using it, I'd like to know🤣

It's doing my head in not knowing. 😉

East Enders?
Presumably not, but it may have popularised it perhaps?

"To do someone in" in Cockney is to beat them up or kill them. So it's just an extension of that, that your head is being done in i.e. battered (mentally).

It's old, as in 100 years or more.

Thank you all!