What Is The Treatment For Sprained Ankle?

My friend has sprained her ankle the doctor advised that she walked as soon as she could. The next day she walked on her swollen ankle and has been doing so for the last six days without crutches. I am worried as the swelling has not gone down and she suffers severe pain at night time. She wore the protective bandage for five days. Basically she did not rest immobile for 24-48 hours after the injury. Could this be dangerous for her recovery ?