Factitious disorder imposed on another is when an adult makes someone else, usually a child, very sick or injured on purpose. Sometimes people do this because they like the attention they get from taking care of the sick person. They might even lie to doctors and nurses about what is wrong with the person they are causing harm to. This is a really bad thing to do and it can hurt people very badly. It can also be called Munchausen Syndrome by Proxy. So always tell an adult you trust if you think someone is making you or someone else sick on purpose.