From Longman Dictionary of Contemporary Englishdo your head indo your head inBritish English spoken informalCONFUSED to make you feel confused and annoyed Turn that noise down – it’s doing my head in! → head
Examples from the Corpus
do your head in• He's so fussy about how he wants things done, it really does my head in.• I've got to do an essay on Kant and it's doing my head in. 