If the scarf is very narrow it'll twist around too. It could be that you're knitting the sts so they're twisted and that will bias the whole thing, or the yarn is spun so that it biases. If you could post a good closeup that shows the sts, it may help.
I don't know how to post a picture. the individual stitches aren't twisted. it is the whole project. instead of the scarf lying flat, the edges spiral around. it happens every time i knit. I have a picture but i don't know how to post it on here.
Is the scarf in stockinette stitch? That is knit a row, turn and purl the next? If so then that is normal and the only way to fix that is with a border that is a non curling stitch. 5 or more rows/stitches works best.
A very narrow scarf in any stitch will often curl anyway.
If the picture is on your computer make sure it's not larger than 800 pixels wide on the longest side..smaller is actually better. Then you can click the paperclip to attach it.