Final answer:
Bulimia nervosa is an eating disorder characterized by recurrent binge eating and compensatory behaviors. It has psychological, behavioral, physical, and epidemiological features.
Step-by-step explanation:
Bulimia nervosa is an eating disorder characterized by recurrent binge eating followed by compensatory behaviors. The psychological characteristics of bulimia nervosa include feelings of guilt, shame, and low self-esteem. Behavioral traits may include binge eating in secret, hoarding food, and engaging in compensatory behaviors like vomiting or excessive exercise. Physical attributes can include dental problems, swollen salivary glands, and electrolyte imbalances. Epidemiological features suggest that bulimia nervosa is more common in females, particularly in Western societies.