Keep it dry, try not to hit the same spot again until it heals, try not to remove it prematurely, let it fall by itself. I recommend cacao cream to help with skin discoloration.
That is the stance the dear union has taken as long as they pay their dues!
BTW: Try not to put your passengers at risk by starting your trip on an adversarial cockpit atmosphere. If you have issues with it, call in sick or explain to the schedulers that you should be removed from that trip due to safety. Just a thought.