It's just emotions.

My sister was studying for an exam (while I was blogging away about Breaking Dawn) when she read aloud a text that she thought I might be interested in:

Bottling up of emotions leads to physical discomfort and muscular pain. Anger is frequently trapped in the muscles of the shoulders. Grief in the muscles surrounding the stomach. And fear in the leg muscles.

Often, this trapped emotion can lead to a chronic postural problem.

--Wilhelm Reich

Oooh... lots of anger bottled up inside :D Or maybe I just need new pillows and try a new sleeping position. Hehe :D