ADHD
The author, Heinrich Hoffmann, worked as a physician and later on as psychiatrist. Some of his stories describe habits of children, which can be in extreme forms signs of mental disorders. Attention deficit hyperactivity disorder is called Zappel-Philip-Syndrom (Fidgety-Philip syndrome) colloquially in Germany. The story of the Suppen-Kaspar (Soup-Kaspar) is a case example of anorexia nervosa. Uncombable hair syndrome is also called Struwwelpeter syndrome, after the book title.