Hysteria is a psychological condition characterized by excessive emotional reactions, often manifesting as uncontrollable laughter, crying, or anxiety. Historically, it was thought to be linked to women's reproductive health, but modern understanding recognizes it as a complex response to stress or trauma. In the late 19th century, Sigmund Freud explored hysteria in his work, connecting it to repressed emotions and unconscious conflicts. Today, it is often associated with conversion disorder, where psychological distress leads to physical symptoms without a medical cause. Treatment typically involves therapy and support to address underlying issues.