Will do some research on ringworm but cannot imagine its anything like that - Max shows no signs of stomach problems and generall in good health, good coat, clear eyes. Surely if it was ringworm there would probably be other health issues.
He does have an outside run however (on concrete) so maybe its where he lies down !
Will get come olive oil and try that (will have to buy some though as I only have the posh olive oil with chillies - dont think Max would appreciate that !)