Madrid did the unthinkable. Leonor Perez Pita, director of Madrid's fashion week, issued a ban on models whose Body Mass Index was less than 18, with the WHO declaring that a BMI of at least 18.5 was the norm for health. In the third week of September, this revolutionary ruling from one of fashion's European events, which had its echoes in Milan, and in London, brought the issue of overly thin models into the focus of international media.
For years, the images of extremely thin models and actresses, fed daily to girls and women through the media, had produced a morbid fear of becoming fat. 
When Madrid's Leonor Perez Pita issued the now famous ban, she cited the incidence of anorexic girls imitating fashion models as the main reason for discouraging a display of such gaunt ramp artistes. In fact, it is not only fashion shows that encourage anorexia. In fact, air brushed and computer touched up photos of celebrities may have the exact same effect, and we need a daily reminder of reality to come to terms with our own bodies.
While the Madrid ban, and its echoes in Milan, have angered many skinny models, a lot of us may actually be heaving inner sighs of relief. How wonderful that it is no longer necessary to be a size 0! Just let out the breath you've been holding.
i think that you will look realy horrible if you are too skinny and if you yet belimik you should tell your docktor straight away