Here is a full translation of the main content of the article “When Should You Be Worried About Sudden Appearing Veins?” 1 :
Many people suddenly notice veins on their arms, legs, and even chest that they’ve never seen before. For the most part, these veins are harmless and result from aging, genetics, or temporary changes in body condition. In some cases, however, the appearance of new veins can be a sign of a health problem that shouldn’t be ignored.
What causes the sudden appearance of visible veins?
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Low body fat percentage: When subcutaneous fat decreases, especially on the limbs or body, veins become more visible as the layer covering them thins.
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Exercise and strength training: During exercise, blood flow increases, causing veins to swell and dilate. With regular exercise, muscles develop and push the veins back to the surface.
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Hot weather: Heat causes veins to dilate to cool the body, making them more visible, especially in the hands and feet.
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Aging: As we age, our skin loses elasticity and thins, allowing veins to become more visible.
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Hormonal changes: Pregnancy, menopause, or hormone therapy can affect blood vessels and circulation, sometimes causing veins to appear in new places.
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