When this flag will disappear?

When these flag will disapper ?

I mean the Green one with 4 inside.

I gain them trying to help an asker who do not liked my answers (links to the documentation.

Nota: The number stop to increase once I stopped to give him answers …
this guy never sent any answer, only questions, and what questions.

I have it since 18 months ago…


That is new private messages.
You may read them and then it should disappear.

Also you can of course block people or ask them to post publically.