Poor Blacky. If at all possible, Blacky needs to go to an emergency clinic right now. This could be as minor as a skin scrap, or as severe as a ruptured eyeball. If you are unable to get to an emergency clinic, use a warm wash cloth to clean off his face and get to a vet as soon as possible if he's squinting or his eye looks odd in any way. Eye issues are almost always very painful and can result in blindness if not treated very quickly.
Good luck! I hope Blacky is feeling better soon. Please let me know if this was helpful information and thank you for using Petco Pet Education Center, formerly Petcoach.