answer:“First aid” for sprains is RICE: Rest Ice Compression Elevation I’m sure that some of those treatments will work for a minor break, too, of course: Rest and Elevation especially. “Rest” is obvious. “Elevation” to help avoid swelling as blood flows to the low (and now rested) joint. I would imagine that “Compression” to aid in keeping down the swelling would help if it were light enough. (You certainly wouldn’t want to compress a displaced fracture! But I can’t imagine that you’ve had a displaced fracture for three days without treatment, either.) For the same reasons as above, I think that moderate icing would assist in numbing the pain. Use an ice bag separated from your skin by a folded towel.