For years, ive been getting bumps on my arms/back/upper chest. they look kinda like scabs, they do not itch or burn unless i scratch one, once scratched off, like a scab it only bleeds, the ammount of them comes and goes, usually in clusters, once picked they just dissapear/turn soft/pink like a scab would. i'm not sure what they are, and no matter where i look nothing anyway says sounds similar