Bruised ankle during dance but not from twisting or rolling it... help!?

I was learning a routine and while figuring out one part I bruised my ankle. The choreography was that you lie down and bend your left leg (knee to ceiling) and right leg (flat on floor, knee outwards as if doing ballet pirouette) and after raising your torso up into sitting position you had to use your arm to push you up onto one leg. I was probably doing wrong, and I leaned too much on my ankle (the bent leg that was flat on the floor) and b/c I have bony ankles and leaned on that one ankle I have a bruise over it now. It doesn't hurt to walk, but it hurts to press on it and is quite large. Help, anyone? I won't lean on it again but how do I fix the bruise? Any suggestions? sorry it's confusing & thx!