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The freckles that stipple many people ’s cutis are often called " sun kisses " because they run to appear or darken after exposure to the sun .
But whydofreckles come out in the sun ?
Those prone to freckling often get freckles on their noses and cheeks in the summer.
A freckle develops as a protective mechanism against harmfulultraviolet(UV ) radiation , Dr. Jill S. Waibel , a board - endorse dermatologist and the aesculapian director of Miami Dermatology and Laser Institute , evidence Live Science . Sun exposure prompts theskinto produce melanin , the paint that produces the many hue of human skin and also allow for pelt to tan .
Melanin scatters ultraviolet illumination rays , meaning it broadcast the rays bouncing in different steering ; this prevent them from penetrating the hide and damage its deoxyribonucleic acid . However , some temporary hookup of pelt develop more of this paint than others , and these melanin - rich spots are referred to as freckle , Waibel say .
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As a effect , freckles tend to become more visible during the summer and disappear or brighten during month when the UV radiotherapy is not as impregnable .
That say , not all freckle respond to the seasonal Dominicus exposure in the same way , Dr. Rebecca Kazin , a instrument panel - certified dermatologist and the director of clinical research at Icon Dermatology and Aesthetics , a dermatology practice in North Bethesda , Maryland , told Live Science by electronic mail .
There are two main types of freckles : ephelides , which are what people typically imagine of as freckles , and solar lentigines , also known as liver spot orage maculation . Both type are more common in people with fair skin and in those with a transmissible predisposition to develop them . However , solar freckle do not fade in the winter like ephelides do , Kazin articulate .
Ephelides , the most common freckle case , are commonly small and light brownness , and they appear on pelt that ’s commonly exposed to the Dominicus : on the face , arms and shoulder , she said . These freckles incline to darken and fleet in reply to shortsighted - term Lord’s Day exposure , while solar lentigo are associated with accumulated sunlight harm to the skin and do not melt .
Solar freckle be given to be larger and non-white than ephelides , and they are more mutual in older people , Kazin said . Also called sun smirch , solar lentigo seem when UV radiation sickness damages the desoxyribonucleic acid in skin and thus change the behavior of melanin - hit cells , fit in to a 2014 review in the journalPigment Cell & Melanoma Research . These change in cistron natural action boost both the issue and production levels of these melanin makers , resulting in patch of skin where melanin pigment accumulates and clumps up .
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Solar freckle are not cancerous and do n’t expect any treatment , but they can look like to someskin Cancer . If you ’re concerned about a spot or notice that one is undergoing rapid change , reach a health care provider to get checked out , Kaiser Permanente advises .
Sun kisses — what most people think of when they think of freckles — are harmless , but perhaps a good reminder for those who freckle easily to slather on their dailysunscreen .
This article is for informational purpose only and is not meant to offer medical advice .
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