Which psychological condition is characterized by a fear of gaining weight and typically involves restrictive eating?

Anorexia nervosa is a psychological condition primarily characterized by an intense fear of gaining weight and a distorted body image, which leads individuals to engage in restrictive eating behaviors. This disorder often results in significant weight loss and a refusal to maintain a healthy body weight. Individuals with anorexia may view themselves as overweight, even when they are underweight, prompting them to limit their food intake severely.

This condition not only affects physical health but also has serious psychological implications, as individuals may develop obsessive thoughts about food, dieting, and body shape. Understanding this condition is critical for identifying the appropriate treatment strategies and interventions needed to support those affected. Other conditions mentioned have different characteristics and are not primarily focused on the fear of weight gain or restrictive eating behaviors.