#self-diagnose

• To self-diagnose — To diagnose oneself medically, psychologically, or technically, based on the analysis of one's own symptoms, behaviors, or operational errors, often using external information sources (such as the internet) and without initially consulting an authorized specialist.
• Self-diagnosed — Having established one's own diagnosis without the confirmation of an authorized specialist; a system, equipment, or patient analyzed and evaluated through its own internal mechanisms or methods of investigation.