Sorry I'm late to the party, an Abronia without a hand is like a bird with one wing, they are so avid climbers and will suffer from the loss of a hand, I would try soaking, the looking for any peeling, if it peels then peel it all off and then massage the wrist, from what I'm seeing there is a lack of blood flow to the upper wrist, the massage with help return that, although this can be a scary process, so I insist that you seek veterinary help. An exotic vet might not know a lot about Abronia's, but the wrist speaks for itself. Good luck
