Update: I found the name - it is dyshidrosis or dyshidrotic eczema. Hope this helps!
listen i saw the pic and it seems that it resembles the fingers of my mother. the doctor told her it was an allergy to something and gave her a skin repair cream and they were cured. but it's better that you go to a doctor/dermatologist because i don't know for sure you know..
Does it itch her? This looks exactly like what my mom had on her hands. I can't remember the name but it was painful and itchy. Hers would start out like a little bump/blister and then once it broke was terrible. The only thing that worked to clear hers up was elocon (or generic name mometesone) It was VERY irritated by water. Even now that she got it cleared up she never submerges her hands in water without gloves. So, I'm no doctor, but I'd try to keep her hands as dry as possible and try some elocon (I do believe this is a prescription, though) Good luck! Hope that poor lil princess is back to 100% soon!