ABSTRACT
BACKGROUND: Frontal hair line dose not exist in the same form for a lifetime, and each individual has a different form of frontal hair line. But, the study of the change of the frontal hair line still dose not exist. OBJECTIVE: The objective of this study of the change of frontal hair line was to analyze whether the change of age, puberty, and the family history of androgenic alopecia was related to the change of frontal hair line. METHOD: This study held a survey which consists of male and female students of each class from middle school to high school. In this survey, the shape of frontal hair line was classified into the egg shape, square shape, and M shape. RESULT: 1. When the age increased, the egg shape type of frontal hair line decreased, and the square type of frontal hair line increased. Especially, men were more salient. 2. During puberty, the egg shape type of frontal hair line decreased, and the square shape type of frontal hair line increased. 3. Before puberty, the m shape type of frontal hair line did not exist, but during puberty the M shape type of frontal hair line appeared. 4. Statistically, the family history of androgenic alopecia of the relationship of the change of the egg shape type decreased, the square shape increased. CONCLUSION: This study shows that frontal hair line is related to the change of age, and existence of puberty.