Just to let everyone know, this is something common with many people. I used to bite my finger nails and it was stress. I am now finding myself with long fingernails and I actually concentrate on keeping them nice, clean etc. Keeping a tool to keep them clean works just as well as biting. If you keep them natural, they will always need a little cleaning. Picking at ones face is also common, especially in the teen years, so as was mentioned here, try to spend more time cleaning your face to rid the breakouts rather than just attacking the breakouts. Most teens do break out with the onset of all the hormal changes that take place all through the teens. Some people twist their hair alot, some pick at the eyebrows.

I think some of it is normal, all one has to do is watch primates, they all pick and groom to relax each other. I have a feeling it is something genetic that just goes way back. The fix is to simply find an alternative more positive way to self sooth and calm.

Open Eyes