Hi and thanks for posting on Petco Pet Education Center, formerly Petcoach!
Thank you for sending along pictures but they are a little hard to make out clearly. This could be an infection-bacterial or perhaps fungal. It could also be due to a flea allergy. I would recommend keeping Jorfy on a flea preventative monthly to rule out a flea allergy but also have him see his veterinarian. Your veterinarian may do a skin scraping and/or fungal culture to rule out bacterial infection or a fungal infection. He may need antibiotics, antifungal medications, or other medications as needed.