Eli5: How does the skin under my fingernails know to “let go” of the nail once it reaches the end of the finger?

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I’ve got a hangnail right now…. I can either rip it off now and deal with the pain, or just wait for it to grow out and then it just lets go somehow.

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6 Answers

Anonymous 0 Comments

Nails grow from a small strip of cells under your cuticle, matrix, that’s why some people who injured their cuticle can have permanent nail deformities even tho the rest of the structure of finger is fine.

Hard keratin of your nail gets pushed continuously forward and nail plate is soft tissue that ends at a predetermined point and then turns into a protective layer called hyponychium that separates nail plate and everything in the world that you touch that wants to harm or live inside of you. It’s that layer that let’s go as it wears off naturally with use.

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