I just shaved and it's ichy

I shaved down my privite part and it's ichy and comes up with lil bumps what is it and how can I get rid of it

Here's a video on how to do that without any problems/itching/razor bumps. I haven't watched it in a while, so there might be some language... I don't remember.
http://www.youtube.com/watch?v=_aVxZ8hidd8

EHow on avoiding itchy skin after shaving:

http://www.ehow.com/how_7416361_prevent-itching-after-shaving.html