Distorting Sound while recording voice

i m using windows 7 and while recording my voice on Audacty 2.1, i get a distorting sound when i playback. why is this happening folks.?

Do your blue waves go all the way up and down on the timeline, or do they flatten out at around 0.5 without hitting the natural overload point? Both of these are caused by operating your recording system wrong.

Describe how you’re getting your voice between your lips and Audacity. USB Microphone?