Histeria is a psychological condition characterized by excessive emotional reactions and dramatic behavior. It often involves symptoms such as anxiety, mood swings, and physical complaints without a clear medical cause. Historically, the term was used to describe various mental health issues, particularly in women, but it is now considered outdated and stigmatizing. In modern psychology, similar symptoms may be classified under conditions like conversion disorder or somatic symptom disorder. Treatment typically involves therapy, such as cognitive-behavioral therapy, to help individuals manage their emotions and develop healthier coping strategies.