Left alone, I am very bad for youse.
Right here, below are certain clues.

Take an axe and cut off my head
Oh, such a nasty term for a woman?

From the rest, drop the other end
I almost become a huge bend.

From the remaining, drop my rear
You are abusing me? Oh Dear!

From what is left, take off my crown
It's your with a deep, grave frown

Now, cut off my tail,
Oh, my identity has changed!

So, What Am I?