painful blisters on feet

I get blisters on my feet, they are not rubbing blisters, but are identical to "coldsore" blisters. The painfull and filled with liquid and before the blisters appear the area is itchy, similar to the way a coldsore area feels before the blister appears. Is it possible to get coldsores on your feet, and if it isnt, herpes simplex, then what is it? Tweet