In these days, skinny young women are increasing and it has become a major health problem. So we investigated their realities and consciousness for skinniness, life style, eating habits and subjective symptoms of fatigue. Based upon this investigation, we studied the effect of women's aspiration for skinniness on their health and eating habits, and the needs of adolescent health education and its ideal way. As the result, average BMI of 15 and 17 years old was lower than that of 2005's national health and nutrition research. In addition, the above average fell below the average of the school health survey results at all classes and skinny trend became clear. Further, among the normal body group, 67.1% students have obesity awareness and 84.5% skinny intention, which suggests that they have unnecessary skinny desire. As for the awareness of the issues for eating habits, it was revealed that the more prone to obesity the higher the awareness and the more skinny the lower the awareness. From this research, we derived the fact that the ratio of fatigue, anemia and menstrual irregularity is high among the skinny which might affect health, though a significant correlation was not found between anemia by skinniness and menstrual irregularity. Therefore, various health problems such as skinny intention in puberty, anemia by skinniness and menstrual irregularity could remain great challenges for health education. High school girls are now at an important stage where adulthood, pregnancy and childbirth are just behind them. Therefore, it seems essential to have them recognize and interest in proper weight, mechanism of skinniness, various health problems such as anemia by skinniness, menstrual irregularity and eating habits vital to health. On top of that, health education is needed so that knowledge and skills about the eating habits can be acquired