Anorexia nervosa is an eating disorder where the sufferer refuses to eat in an attempt to achieve a certain body weight. If a person is struggling with anorexia, she will often refuse to eat or come up with excuses about why she cannot eat. She may also skip meals or pretend she has eaten when in fact she has not. Though she may appear hungry, she may deny her hunger and refuse to eat. As well, she may create a very restrictive diet for themselves, whether it is counting calories so she eats significantly less calories than her body requires or only eating low fat foods that she thinks will not lead to weight gain. These are considered “safe” foods, and may be used as an excuse to show she is eating when in fact she is eating a lot less than she should be to maintain a healthy diet. Many young girls who suffer from anorexia will develop food rituals to maintain control when they eat. She may push food around on her plate to make it look like she ate or she may pick at her food but not actually eat any of the food on the plate. She may also cut her food into small pieces or chew food and then spit it out. She may also have a food ritual where she throws up after eating. Note if she goes to the bathroom after every meal and has issues with tooth decay or bad breath, which are both caused by the acid in vomit. This is likely due to a desire to maintain control over her weight and to feel she can maintain her weight loss. Many sufferers of anorexia will have an extreme focus on their exercise regime and may workout daily or multiple times a day in an effort to maintain their weight. You should also note if she is ramping up her workouts, but her appetite has not increased or she is still not eating at all. This may be a sign her anorexia is getting worse and she is trying to maintain control over her exercise regime as a way to control her weight. Anorexia is also a disorder that appears on a psychological level, where the sufferer constantly complains about her weight or puts down her appearance. She may do this...

TL;DR in Indonesian:
Amati apakah dia selalu menolak makanan atau menjalani diet yang sangat ketat. Amati ritual-ritual tertentu yang dilakukannya saat dan setelah makan. Amati apakah dia tiba-tiba gemar berolahraga secara berlebihan. Amati apakah dia kerap mengeluhkan berat badan dan penampilannya. Tanyakan padanya apakah dia meminum pil diet atau suplemen penurun berat badan. Amati jika dia mulai menarik diri dari sahabat, keluarga, dan lingkungan sosialnya.