I say "bites" because that's the only way I can describe them. But lately, I have been noticing weird itchy bumps on my breast, just my right one. If I touch the bump, it doesn't hurt, or it's not sensitive. But, if I scratch it, it gets worse and starts to hurt. They are not on my areola or nipple, but the outside of it. And they aren't in a place that rubs against other skin. It's more toward the top of my breast. I checked my mattress for bed bugs, and got nothing. I've lived in my apartment for over a year, and this started happening just a month ago. They heal on their own in about a week and go away, but more pop up after the other ones heal. I haven't changed my routine, or even soaps or detergents lately. So this is really confusing me. Help, please?