Several essentials oils have been studied and found to be helpful with bruises and pain. Lavender is probably the most common. Arneca, turmeric, frankincense as well.

My husband had a NASTY bruise on the top of his foot. Bruising covered almost the entire top of his foot and he could barely wear a shoe. Lavender essential oil help dissipate the bruising quite quickly.

Side note: Never use essential oils undiluted.