My skin is red, how do I treat it and is it a problem? (Photos)

Can anyone help me identify this problem with red skin and bumps on upper arms. The photos I've attached to it very little justice of how bad it is these are rather indications to back-up the description. The skin is very-very red compared to other peoples skin. You can particulary notice it in good light. It's embarrasing to show and I avoid using t-shirts recently. This problem has been with my ever since fourfive years ago. I don't think it's karatosis pilaris, I have good hygiene.

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