Every several months to a year, I start to develop a red rash on each of my areolas. It appears as little red bumps that pop up. The areola then begins to itch horribly, to the point where it is completely unbearable. The doctor I went to a year ago did not know what it was. At one point, I couldn't stop itching and began to scratch my skin raw. I don't know what they are, or how to deal with them.
http://www.rightdiagnosis.com/symptoms/areolar_lesions/causes.htm
Atopic dermatitis
Contact dermatitis
Irritant dermatitis
Trauma
Breast abscess
Candidiasis
Seborrheic keratosis
Breast cancer
Bowens disease
Candidiasis is very interesting and surprising item on this list. I think a lot of people have systemic yeast problems that they don't even know they have.
I hope this is helpful!