The comments about how the Empress of Japan no longer wears tiaras and why jogged my memory. I have a newspaper item relating to how some prominent English ladies secured tiaras. The article does not say why all the different methods were used but it has made me think. It is a 1933 article from the Daily Telegraph. It says that Mrs Greville used a cap of silvery grey gauze to secure her tiara.
If others have information about how tiaras are secured - and possibly how different royal ladies avoid pressure point pain, I think we could do an interesting thread, especially when those who use Photobucket are able to post again, as I think the placement of some tiaras and how they are secured provides some insights into how various ladies deal with possible (probable) pressure point pain from wearing rigid pieces of metal tied tightly to their heads.
Photobucket is not available to me at present, but perhaps those who do have access might like to start the thread - and also those who use other image hosting sites.