First, on my chest and stomach, and now I have two on my left arm, right above my armpits, I have a few on both my breasts and it seems that it's starting to appear on
my back as well. I even have a few on
my neck. These bumps
are extremely itchy
at times and when I scratch them too much, they start to bleed, although there's no pus or anything. Sometimes, when I scratch, some of them sting.
Does anyone know what might be the cause of this? Is it serious?