What kind of itchy? Raised bumps that forms welts like hives? Or a rash like eczema? Or do you just have dry skin because of winter??
I think you should see an allergist. It could be seasonal, or something is triggering your reaction (and timing is just coincidence). Depending on wat you have you should take allergy medicine, anti-histamines h1 and h2 blockers, they sell Zyrtec over the counter now its great for hives. If its eczema i recommend buying an over the counter anti itch cream (hydrocortizone cream is great, dont get ointment is really oily) and use it until you see a doctor. And if its dry skin i highly recommend cetaphil moisturizer and dove bar soap.