Rose 1804-3 Sock Sprain - Why did I remove my aircast?

Starting from:

Rose is out waking on her sprained ankle without crutches.
Since her foot is swollen she cant get a shoe on it so she us a thick sock under her aircast.
After some time she remove her aircast but that was maybe not a good idea for efter some minutes the pain in her foot get worst and she first start to walk tip toe and some minutes it´s so bad that she must jump on one leg.