How do nails constantly grow while still being attached to your skin?
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The base of the nail, where it touches the skin, is what makes the nail in the first place and adds new material to cause it to grow. It is the only part of the nail that is alive.
If it were not attached, that part would receive no blood, and thus no nutrients. It would die and the nail would stop growing.
Your nail is pushed out from the base of the cuticle. Think of it as slipping on very soft tissue.
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