Ringworm is a fungus that is very contagious both to humans and animals. My daughter had it when she was in the hospital having chemotherapy treatments. The doctor prescribed a cream which was applied to it 3 times a day (ALWAYS wear rubber gloves when applying). It can take anywhere from 3 weeks to 3 months to go away.

My cat, RB Marina Mar got it as a kitten behind her ears. It took 3 months to go away and I kept her isolated in my spare bedroom from my other cats.

Most people who don't know what it is get totally freaked out when they hear the word ringWORM, even though it's NOT a worm.