The best thing you can do is to get him to your vet asap. If he does have ringworm he needs to be treated for it. Please let them know what you may suspect before bringing him in as they will have to take steps to ensure it does not get passed on to other patients.
Here's some measures you can take to help protect yourself. Good luck and let us know.
Assumptions do nothing but make an ass out of u and me.
We can stick our heads in the sand for only so long before it starts choking us. Face it folks. The pet population is bad ALL OVER THE WORLD!