Mic echo.

For some reason my mic gives an echo. When my friends talk they say they hear an echo. And when someone talks my mic plays the sound thing even though I am not tlaking. How can I fix this.Mic echo.
connection related, it will come and goMic echo.
yes it is connection related, whoever if the problem presists i would suggest trying another mic, i have never had an echoing problem myself
Thank you for the help.