Anorexia, or anorexia nervosa, is a serious eating disorder characterized by an intense fear of gaining weight and a distorted body image, leading individuals to restrict their food intake significantly. People with anorexia often exhibit extreme weight loss and may engage in excessive exercise or other behaviors to avoid gaining weight. The disorder can have severe physical and psychological consequences, including malnutrition, organ damage, and increased risk of mental health issues. Treatment typically involves a combination of nutritional rehabilitation, therapy, and medical support.