If it's like bandage bind I gave this to my first horse after she had an injury and I left her bandages on too long
I felt sooooo awful; the backs of her cannon bones got scabby, then pusy underneath and then the skin came off and it was all raw and painful. I still squirm to think about it, but I had no one to advise me properly at the time (vet only came once a week or so to check up).
Sounds like Flora at the moment, but the bandage was put on by the vet (not me), vetwrap without any padding underneath to keep a dressing on when she cut her leg last week.
She is just a bit scabby (no sign of pus or weeping skin thank god), but has caused a bit of a lump on the front of her cannon bone over the extensor tendon due to the pressure, though vet says should go down within a month or so.
My boys got them too. Felt awful but hes been bandaged for 7 weeks and although they were changed by a vet every 3 days with vetwraps, donut to relieve the pressure, padding and more padding it still happened. The bandages are off now and it was healing nicely until my boy itched them raw and now they are all scabby again!