Model Issue

I’ve run into a small problem while trying to model my character, I started with a cube, sub divided and then cut it in half and removed the side by deleting the faces. I then proceeded to model my character, I checked the subsurf modifier and this is what it looks like.
Not sure what I did wrong. Can anyone help me?

http://img4.imageshack.us/img4/6695/howtofixthis.jpg

Sure we can help but it is hard to see what is happening, just post the blend. It looks like you have faces inside your model, delete them!