More info. Louse is the singular for lice. Does your daughter have lice? I can't imagine anyone calling your daughter a louse. If you misheard then perhaps speaking to the doc again would really help.
Louse. Not sure. A louse is a one lice. Lice are bugs you can get on any area with hair.
Hard to say. It is impossible to say. You would have to call the doctor and find out what they wanted. It is possible that they called the wrong phone number.