Background: the female pattern hair loss is the most common cause of hair loss in female, which is androgenic pattern, medical treatment such as anti-androgenic therapy and topical preparation may simply arrest progression of female pattern hair loss or in some women stimulate partial growth of hair, but the response is slow. This study aimed to determine the most common causes of hair loss among female with regard to the age, the effect of some drugs, balanced diet, average amount of hair loss per day. Objectives: this study aimed to determine the most common causes of hair loss among Saudi females. Materials and method: this was a cross sectional study of the women aged 20-50 years designed in a questionnaire form involved series of questions with multiple choices answers. It was conducted in Saudi Arabia in October 2017. The data entry was done by using Microsoft Excel, while the analysis was done by using SPSS version 23 and we used it in test correlation coefficient Spearman with measuring the mean value for all questions. Results: data were analyzed via using SPSS program, version 23 and we used it in test correlation Coefficient Spearman between Q1 AND Q9=0.146 week positive and p-value=.087 >0.05 we didn't reject the null hypothesis. Correlation Coefficient Spearman Q23 and Q29=.008 no relation and p-value=0.927>0.05 we didn't reject the null hypothesis. In Q3 the mean was =6.83 and Q7; the mean was =2.50. Conclusion: in KSA we found the unbalanced diet to be the most effective factor that leads to hair loss among out sample size. In the present study we need to educate the population about the importance of balanced diet for maintaining of healthy hair and skin.