Couch doctors are individuals who diagnose medical conditions without proper medical training or credentials. Other phrases that are often used interchangeably with "couch doctor" includes "armchair physician," "internet doctor," and "self-diagnosis expert." These individuals often rely on information they gather from the internet, personal experiences, and other unreliable sources to determine their medical condition. Such self-diagnosis can be dangerous, as the symptoms of many medical conditions overlap and can be easily misinterpreted. While it's understandable to seek out information about health concerns, it's crucial to consult with a qualified medical professional before making any personal medical diagnoses or treatment decisions.