@nurit I'm not sure what you mean by internal bruising. If it accumulated blood in the tissue, gentle massage and a lot of movement will help your body eliminate it more quickly. If the bone itself is bruised, the usual recommendations are rest, ice, elevation and pain control. I had a bone bruise on my hip from a fall, and it took 4 months for the lump to diminish and pain to go away.
Ice should be used 3-4 times a day.