HUGE red bump/pimple from shaving?

Keep it clean and don't mess with it. The more you mess with it, the longer it will take to heal. Don't put lotion on it because that will clog it up. Just a thin layer of antibacterial ointment twice a day will help it. You can bandage it for a little while, but make sure to keep it uncovered whenever you can so that the wound can breathe and drain.