There are a vast variety of physical, emotional/behavioral, biological, psychological, environmental, etc. symptoms that can lead to someone having Anorexia Nervosa.
Lady Gaga and many other celebrities also suffer from Anorexia as well!
A very famous and popular pop artist, Lady Gaga, has suffered from Anorexia Nervosa from the early age of 15. She would post pictures on Instagram about every week, but would get very hurtful comments like you're "fat". Gaining weight really flooded her Instagram page. She felt very self- conscious when people would do this to her, which caused her to decrease the amount of food she consumed daily. Eventually, she started to respond to the harsh comments that she was given by stating "I'd rather be fat than shallow" which started a "body revolution" on Instagram. When Gaga did this, she started to understand her illness, and stood up for herself as did so many of her fans. "Proud at any size, because the inside is what really counts" Gaga spoke with confidence.