Dark knees are often due to a higher concentration of melanin in that area compared to the rest of your body. This is a common variation and usually not cause for concern. Several factors can contribute to the darkening:
Causes of Dark Knees:
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Melanin Production: Your skin naturally produces melanin, a pigment responsible for skin color. Higher melanin production in the knees is a common reason for darker pigmentation. (Source: Medical News Today, Dec 9, 2020). If your natural skin tone is darker, you're more likely to have darker knees. (Source: WebMD)
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Friction and Pressure: Repeated rubbing from clothing or kneeling can thicken the skin on your knees, leading to a darker appearance. (Source: SkinKraft, Source: Soft Services)
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Sun Exposure: While not as significant a factor as melanin concentration or friction, sun exposure can contribute to hyperpigmentation (darkening of the skin) in any area, including the knees. (Source: Quora)
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Build-up of Dead Skin Cells: A thicker layer of dead skin cells on the knees can also contribute to a darker appearance. (Source: LEGOLOGY)
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Genetics: Genetic predisposition can play a role in the amount of melanin produced in different areas of your body. (Source: Reddit)
Important Note: Dark knees are typically harmless and not a medical concern. (Source: Medical News Today) However, if you have concerns or notice a sudden change in pigmentation, consult a dermatologist.
