６-4.Maintenance of pigmentary deposit：Bristletail
	When the melanin metabolizing collapses, the melanin pigment is excessively accumulated in epidermis as a result. It is said the pigmentary deposit as being possible to do thus calles it generically with the bristletail and freckle. Freckle is called liver spots from its resemblance to the pattern on the surface of the liver. There are an abnormal hormone's influencing a lot, and it deteriorates because of ultraviolet rays though there is a paragraph that freckle can be done by the affection of the liver, too.
	●Do the age, it is wide from 20 to 60 years old, generated, and it increases especially since the latter half in one's thirties (About 42 years old on average). ●The range where the bristletail can be done is limited, and it is not unusual to be able to have the body symmetrically either. There are a lot of faces, and the place that can be done is a cheek, amount, and the lip surroundings, etc.The color is various from the drab to the seal brown, and shape is clear of the infinite form and the boundary. The bristletail is not often noticed to be made because there is no subjective symptoms such as pains and itchy.