Some spots are a manifestation of photoaging of the skin, such as age spots, which tend to appear after the age of thirty; some spots are hereditary, appearing from childhood or adolescence, and are aggravated by sun exposure, such as freckles; and some are caused by a combination of endocrinology, sun exposure, and improper skincare, which tends to appear after the age of twenty-five, such as chloasma, which is usually accompanied by the destruction of the skin barrier.

Spot dark yellow is sometimes a manifestation of aging or the result of slow metabolism, so the age will have a certain relationship, but the maintenance of appropriate care can be avoided!