UPDATE: I took him to the vet when I got off work today. He's staying overnight so the doctor can see him first thing tommorrow morning. He had a ruptured abscess that looked a lot worse in person then in picture. He's getting a shot to reduce swelling and some antibiotics
Thank you for responding so quickly! He's an indoor only cat and it seems like he's not bleeding any longer. I was considering using warm saline solution to clean the wound and putting a cone on his head so he wouldn't mess with the wound
I'm at home visiting family and my roommate sent me this picture of my cat. It's about a 2 hour drive home and the vet in town is closed on Sundays. The nearest emergency vet is 1 hour away. How worried do I need to be? Does anyone know what this could be?