Open AccessFacial skin photo‐aging and development of hyperpigmented spots from children to middle‐aged Japanese woman
Author(s) -
Takahashi Y.,
Fukushima Y.,
Kondo K.,
Ichihashi M.
Publication year - 2017
Publication title -
skin research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.521
H-Index - 69
eISSN - 1600-0846
pISSN - 0909-752X
DOI - 10.1111/srt.12380
Subject(s) - skin type , medicine , dermatology , skin color , spots , hyperpigmentation , skin aging , dark skin , pathology , artificial intelligence , computer science
Abstract Background/Purpose Facial skin hyperpigmention caused by chronic sun exposure is a major skin complaint, however, its characteristics and influential factors are still limitedly known. Methods A cross‐sectional survey in healthy Japanese women aged from 6 to 62 years (n=169) was conducted using a facial image analyzer VISIA ™ for knowing onset age of hyperpigmented spot formation, its chronological changes, and influence of environmental factors. Results UV Pigmented Spot ( PS ) Score was positively correlated with age (R=.487, P =.000). Hyperpigmented spots appeared first around 18 years old in most subjects, and PS score remarkably increased at 20s then gradually increased by ages. The subjects with Skin Type I, one of the three grades of Japanese Skin Type ( JST ), whose melanin formation is genetically lower, showed higher PS score. A woman aged 31 years was subjected a weekly VISIA measurement for 2 years, and found no changes in the number, place, size and intensity of the pigment spots in this duration. Conclusion Hyperpigmented spots developed in women over 20 years of age due to chronic sun exposure without sun protection during childhood and adolescent and it was stable afterwards, whose intensity was influenced by age and skin type.