I have my cat with ringworm, which also causes hair loss
and it is also spreading. My cat
doesn't seem to be itchy around the ears. So, would you describe for us how the skin looks? Is it dry, flaky, scaly, do you see scabs? Sometimes, the only symptoms for ringworm is hair loss in irregular patterns. Doesn't have to be circular spots. So, I'd pay attention to that.
Another thing which could be happening to your cat is allergies.