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The pigmentation of the skin is the consequence of the production of melanin. This phenomenon is called melanogenesis<\/span><\/strong>.<\/p>\n The cells responsible for the production of melanin are the melanocytes<\/span><\/strong>They are located at the base of the epidermis (the most superficial layer of the skin). They are evenly distributed in the basal layer of the epidermis and in the hair follicles. The number of melanocytes is identical in the different ethnic skin types. Each melanocyte is in relation with about 36 keratinocytes, to which it distributes the melanin produced, thus forming an \"epidermal melanisation unit\".<\/p>\n In the drawing opposite, the grey cell is a melanocyte. The cells surrounding it (in beige) are the keratinocytes<\/span><\/strong>The main cells of the epidermis. When melanin is produced, it is transferred to all the neighbouring cells. The pigment thus spreads to the base of the epidermis, giving the skin its brown colouring.<\/p>\n There are two types of melanins:<\/p>\n This is how skin colours range from very light to black. The red colour is due to the presence of a particular melanin of different colour.<\/p>\n<\/blockquote>\n Melanin pigmentation is therefore genetically determined, and is UV-regulated<\/span><\/strong>some hormones and chemical mediators. The ultraviolet rays of the sun<\/a>\u00a0cause an increase in the activity of melanocytes: the skin turns brown, this is what we call the tanning<\/span><\/strong>. It is a way for the epidermis to protect itself.<\/p>\n <\/p>\n There are different types of spots of melanic origin:<\/p>\n The beauty spots<\/span><\/strong>These are benign proliferations of melanocytes that gather in clusters. They obviously do not fall within the scope of depigmenting cosmetic products.<\/p>\n<\/li>\n<\/ul>\n The freckles<\/span><\/strong> are small spots made of this particular melanin that only redheaded skin produces. They are natural and become more visible in the sun.<\/p>\n<\/li>\n<\/ul>\n The sun spots or age spots<\/span><\/strong> (which dermatologists call lentigo) The melasma<\/span><\/strong> peut appara\u00eetre durant la grossesse ou lors d’un traitement hormonal (pilule). Il est accentu\u00e9 par le sun<\/a>. They are light brown to very dark brown spots with irregular borders. They are located on the forehead, cheeks and sometimes the upper lip, in a symmetrical way. The melanin pigment may be located in the epidermis, but also in the dermis or in both locations at the same time. Only the pigment present in the epidermis can be improved by depigmenting cosmetics.<\/p>\n<\/li>\n<\/ul>\n The post-inflammatory pigmented marks<\/span><\/strong> are the pigmented after-effects of an inflammation of the skin. They can occur after an infection, a skin allergy, a reaction to medication or trauma. They are frequent during acne<\/a>.<\/p>\n<\/li>\n<\/ul>\n <\/p>\n The depigmenting products<\/a>anti-spot, or lightening, allow to reduce the intensity of the pigment<\/span><\/strong>but do not make the spots disappear completely. Three main mechanisms allow the reduction of pigmented spots: reduction of the triggering signals caused by the sun's ultraviolet rays, reduction of the production of melanin in the melanocytes, reduction of the transfer of melanin to the cells of the epidermis.<\/p>\n <\/p>\n Understanding and treating pigmentation spots How are pigments formed in the skin? The pigmentation of the skin is the consequence of the manufacture of melanin. This phenomenon is called melanogenesis. The cells responsible for the production of melanin are the melanocytes, located at the base of the epidermis (the outermost layer of the skin). Read more >>><\/a><\/p>","protected":false},"author":1,"featured_media":4348,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"en-passant","meta":{"_mi_skip_tracking":false,"spay_email":""},"categories":[86],"tags":[],"jetpack_featured_media_url":"https:\/\/hyfac.fr\/wp-content\/uploads\/2018\/03\/banniere_carree_site_hyfac_intro_themes8.jpg","_links":{"self":[{"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/posts\/4328"}],"collection":[{"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/comments?post=4328"}],"version-history":[{"count":20,"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/posts\/4328\/revisions"}],"predecessor-version":[{"id":5046,"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/posts\/4328\/revisions\/5046"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/media\/4348"}],"wp:attachment":[{"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/media?parent=4328"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/categories?post=4328"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hyfac.fr\/en\/wp-json\/wp\/v2\/tags?post=4328"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"\"](\"https:\/\/hyfac.fr\/wp-content\/uploads\/2018\/03\/mecanisme-pigmentation-peau-clarifac.jpg\")
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What are the different types of pigmented spots?<\/span><\/h2>\n
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\u00a0are small dark brown spots that are more common on parts of the body exposed to the sun (back of the hands, neckline, face). The pigment sits at the base of the epidermis. They increase in size and number with age. They are the preferred target of depigmenting cosmetics<\/a>.<\/p>\n<\/li>\n<\/ul>\n\n
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How do depigmenting products work?<\/span><\/h2>\n
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