[Skin Concerns] Weird bumps all over the top of my left and right arms, while the bottom side is clear and smooth. Any idea as to what they are and how to get rid of them?

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I have been to a dermatologist, but he did not seem to know why I had them or how to get rid of them. The bumps do not itch or hurt at all, but they really bug me. Anyone know what it is and if there's a way to get rid of them?https://imgur.com/a/zm1V6
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Submitted by xfortnight