You become anorexic by breaking the judgment between your eyes and your brain. You will feel fat and want to lose weight by stopping eating. You will develop an eating disorder. You lose weight dramatically because your muscles are atrophying, you stop having menses, so you won't be able to have children, your hair looks good and actually all the hairs on your body, your tooth enamel is etched. Even if all this happens and you look like a skeleton with skin on the skin, you will still feel like you are fat. (devil) If you ate sometimes and then spilled it, or supplemented with laxatives, you would be a bulimic girl who looks just like an anorexic. The worst part is, of course, the physical degradation, but it is not negligible that you isolate yourself from normal people, friends, family. From normal interests and hobbies. You will be completely alone with the mirror and the weight. Your only thing left in your brain is to lose weight! You will lose yourself, your life. You will become a 100% slave to your emaciation.