It could be eczema - I have that, but not all over. It's not too hard to treat. I don't know if it would be allergies - I get rashes like that in the summer, from grass, but since you said it's all year round, it's probably something else.
However, it could be your laundry detergent and/or your body wash/soap. You use those all the time, so maybe try switching those up.
It could also be psoriasis, but I don't really know enough about that disease to accurately describe the symptoms.
I would suggest that you visit a doctor - just a GP will be fine for now and if they don't know what it is, then they can refer you to a dermatologist.
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Just call me Katie.
I'm marrying Jamie Hunt on September 15, 2008. Counting down the days!