Ellen has trouble controlling her impulses to eat, especially at night. Once she starts, she cannot stop. Often, she will eat an entire pizza or gallon of ice cream before bed. She does not try to compensate for this excess caloric consumption; as such, she is gaining weight. Ellen probably suffers from: . i. bulimia nervosa.
ii. impaired thyroid activity.
iii. binge eating disorder.
iv. anorexia nervosa.