The book reveals the theme of laughter and its relationship with human psychological states. The author, a well-known psychologist, writer and humorist, explores the mechanisms of laughter and self-irony, and also clarifies which cases may indicate mental problems. In the book you will find answers to questions about why we laugh, how laughter affects our mental health, what is the role of laughter in psychotherapy, and how humor can avoid or solve some problems. The author gives many examples from his practice and personal experience, which makes the book interesting and accessible. In addition, the book discusses the difference between healthy and unhealthy laughter, and also discusses the types of laughter that may indicate mental problems. The author gives recommendations on how to learn that laughter is a symptom of mental problems, and what to do in such a situation. The book will be a useful resource for both psychologists and psychotherapists, as well as for anyone interested in the topic of psychology and humor.