My 11yof has a small group of blisters on her pinky finger and toevwith swelling around the joint, red, painful and hot to the touch?

See her doctor. Swelling, redness, pain & warmth are all signs of infection. Without examining your daughter and seeing the rash, it's very difficult to make a specific diagnosis. Considering you noted several signs of infection, she should be seen by her pediatrician as soon as possible, as she may need a Rx for antibiotics.