The simple fact that you have to ask means you don't really know enough to do the job properly, nor have you given us enough information to help you do the job properly (and the likelihood that we can is pretty slim, anyhow). If your horse needs care, you should consult a professional horse trainer or a vet.
i was just wondering if i could because she just banged her knee on a bar and it hurts but the vet wont come out cuz its noe severe but other ppl are telling me to wrap it. but if i wrap it she cant walk i dont think
Yes, it can be wrapped but I don't know anything about how to do it.
yes my brother had an x race horse who cut his knee and he did
I would guess so.