Illness in others. This disorder, named for a german storyteller, is a psychiatric condition in which the sufferer knowingly feigns illness and submits themselves to numerous unnecessary treatments including hospitalizations and surgeries. The by proxy type is when a family member, usually a child, is subjected to the same treatments urged on by usually a mother of the child.
Name issue. Baron van munchausen was a character of history who made up many fake illnesses to gather attention to himself. Munchausen by proxy refers to a parent who makes up or induces medical problems in a child to bring attention to that parent as a long suffering doting parent.