[Skin concerns] Does anyone have any idea what this small bump on my elbow is? (link in post)

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Hello!I have had a small bump (maybe half a cm) on my elbow for around 5 years. It is painless and slightly raised. I thought maybe it was a wart, but I failed to burn it off, and it hasn't spread anywhere. Do any of you amazing skin pros know what it might be?https://imgur.com/a/ujbX2Thank you for any advice!!!
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