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Freckles are predominantly found on the face, although they may appear on any skin exposed to the sun, such as arms or shoulders. Heavily distributed concentrations of melanin may cause freckles to multiply and cover an entire area of skin, such as the face. Freckles are rare on infants, and more commonly found on children before puberty.
Freckles usually only occur in people with very lightly pigmented skin. They vary from very dark to brown in colour and develop a random pattern on the skin of the individual. [ 94 ] Solar lentigines , the other types of freckles, occur among old people regardless of skin colour. [ 2 ]
The characteristics of an organism arise to some extent deterministically (e.g., under the influence of genes and the environment), and to some extent randomly. For example, the density of freckles that appear on a person's skin is controlled by genes and exposure to light; whereas the exact location of individual freckles seems random. [19]
One day, Rebecca Hockaday noticed freckles appearing on her chest. The mom of two, from Georgia, simply chalked them up to being in the sun. "Honestly, I thought they were sun spots.
Mongolian spot is a congenital developmental condition—that is, one existing from birth—exclusively involving the skin.The blue colour is caused by melanocytes, melanin-containing cells, that are usually located in the surface of the skin (the epidermis), but are in the deeper region (the dermis) in the location of the spot. [6]
"You see how the forehead wrinkles or the neck moves when they smile; if there's a wrinkle appearing on the cheeks, you try to incorporate that into your sculptures. The makeup will move the same ...
Freckles and moles are formed where there is a localized concentration of melanin in the skin. They are highly associated with pale skin. They are highly associated with pale skin. Nicotine has an affinity for melanin-containing tissues because of its precursor function in melanin synthesis or its irreversible binding of melanin.
The Crowe sign or Crowe's sign is the presence of axillary (armpit) freckling in people with neurofibromatosis type I (von Recklinghausen's disease). These freckles occur in up to 30% of people with the disease and their presence is one of six diagnostic criteria for neurofibromatosis.