I have a grade 2-3 ankle sprain, i have ace wrap air cast and crutches. can i sleep in the ace and cast and when does this pain and swelling go away?

Try it without.: You probably don't have to sleep in the cast, but the foot and leg should be elevated. Use several pillows to supply support to the entire leg. The foot needs to be elevated to speed up the de-swelling process. Ice application and swelling reduction should reduce the pain. Try taking Advil (ibuprofen) for faster pain relief. If you need to get up at night, use the crutches.