Mycosis is when some yucky stuff called fungi (you can imagine them like little tiny mushrooms, but not the yummy kind) attack your body and make you feel really sick. They can make you itch, give you rashes, mess with your breathing, and even cause some big problems inside your body. It's like having some mean little monsters inside you that you need to kick out.
To protect yourself, you have to be clean, wash your hands often, and avoid touching things that might have those nasty little fungi on them. You should also wear clean clothes and avoid sharing clothes, towels, or bed linens with other people, particularly if you know they have fungi or are prone to infections. If you already have a mycosis, you must take medicine that helps you get better and follow your doctor's instructions closely to avoid spreading the infection to others. Remember that with a little care, you can kick these monsters out from your body and be healthy again!