I have a tendency to scratch my legs until they bleed while I sleep. Why?!

It does not happen every night and I have racked my brains as to a reason!. It is not new washing powder or anything like that!. It is not down to my shaving my legs as the timing does not fit!. I have wondered if it is stress induced but cannot see why!. This happened last night and I was not stressed (until I woke up and saw the blood, AGAIN!)!. It does not seem to fit with a certain time of the month so I am at a bit of a loss as to why!. It is only below my knees that get all this attention!. I do suffer with excema but it has only ever been on my hands and this is not showing the same patterns as excema does!. Anyone have any ideas why I batter my lower legs (usually just the left one) to within an inch of flaying the skin completly once or twice a week!. It flippin' well hurts!! Cheers and Have Fun :0)Www@Answer-Health@Com

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