Final answer:
The complications in diagnosing patients with anorexia nervosa are distorted body image and denial of the severity of low body weight.
Step-by-step explanation:
The two complications in diagnosing patients with anorexia nervosa are distorted body image and denial of the severity of low body weight. Anorexia nervosa is an eating disorder characterized by maintaining a body weight well below average through starvation and excessive exercise. Individuals with anorexia nervosa often have a distorted body image and perceive themselves as overweight despite being underweight. They also tend to deny the seriousness of their low body weight.