Poor hygiene

If that person is my friend I would tell her directly that she has a bad hygiene and she needs to do something about it.If she is just an acquaintance then if I can't tell her directly I think the best way is to write her a note that says I am just concerned about what other people think about her poor hygiene.

It depends on whether a person is somebody close to me like my hubby or children, or brother, sister, or close friend. If so, I just simply say "you stink..go and take a bath"... or "brush your teeth"...or..."use a deodorant". I say it with authority. For I know that they would understand me better if said vocally. But when it comes to poeple I don't personally know... I won't bother myself telling them. I may get hit with a hammer... :)