Does anyone know what the skin rash is that is going around?

Aw, man, I think I know what it is! What's the name again? It's right on the tip of my penis-I mean tongue...|||What rash? Going around where?|||you mean mumps??|||You need to be more specific. It could be body lice (scabies which is transmitted by contact)- poison oak/ivy- or 5ths disease.