Dear friend,
If this is not responding to antibiotics - it may be fungal - like ringworm. Please look at these photos:
www.fabcats.org/ringworm.html
You can treat it with a fungicide like lamysil of conofite.
If it is not ringworm it could be staff which would require oral antibiotics you would get from your vet.
Let me know if it looks like ringworm and if you have any additional questions. I will be happy to help.
Very sincerely,
Terri
Dedicated to Cats and the people who love them!
Please press ACCEPT if my answer was helpful and leave feedback Thank you! Terri