I may have been exposed to a poison plant (ivy, sumac) or be having a reaction to a new medication Sovaldi.----- I have little tiny blisters that just popped up on my right hand between my index and middle fingers and is seeming to spread up my hand to my wrist . There are a couple of these little blisters on my left hand now as well. It s only mildly itchy, the bumps (blisters) are filled with fluid (so tiny not much fluid) - I was in the park with 2 yr. old grandson who threw a ball which landed under a little bush near a pond in the park that contains turtles, geese and swans as well as a couple of coy.