A pal of mine (on a camping trip years ago) started a bleed and after the usual "Did you have your period early" jokes I decided to help him out because he was beginning to panic and we were in the middle of effing nowhere - before mobile phones BTW.

Because I wasn't sure how it had occurred i administered the isopropyl alcohol spray direct - now I still recall the comic image of a man dancing around a scottish mountain with his trousers round his ankle being voraciously attacked by their deligtful midges.
I followed up with clean water on an alum shaving block (which he administered I might add ) and mercifully the bleeding stopped.

He must have rechecked himself about two hundred times that weekend and it took several salt tablets(placebo) and much verbal assurance that he wasn't going to exsanguinate on some lonely scottish mountainside.