Hi, I've had little bumps on my upper arms skin for years, mostly skin-colored but they get red sometimes. It's the only place I get them, they don't itch but they can look ugly when they're particularly bad.
One of the only ways I've found to get rid of them is to "pop" them with tweezers (yes, gross, sorry), and inside there's always a hard solid shiny white thing (about the size of the head of a large pin). It's not like what comes out of a black or white head pimple. But after that's gone, it's red for a day then disappears. Been looking up skin conditions online and most signs point to Keratosis, but none of the descriptions mention the bumps having anything in them, or Calcinosis, but all the pictures of that look nothing like it at all. It's not impacting my life much other than I don't wear really short sleeves, but I'd love to get an idea of what it could be and maybe what I could do to get rid of them without busting out the tweezers.