What Causes Red Pimples Like Blemishes On The Breasts That Have Raised Scarring?

I have red blemishes resembling blind pimples on my breasts, mostly at the sides. The remains of the oldest one are now a small slightly raised deposit of scar tissue. Another that came up over a month ago, got really itchy, after a shower say 2 weeks ago the blemish was replaced by broken skin. I m assuming that it was a pimple that burst, as it s healing slowly, it s red and feels like it s forming a scar tissue deposit, the same as the last one. On the other breast one appeared last week and another this week. I m in my 40 s, Female, Breastfeeding mother, my diet is pretty good and I take a womens specific multivitamin as many days as I remember. I have keliod scaring of the upper torso, from a mole removal. I also suffer mildly from excemaId like to know what might cause, things.How I can prevent more.and how can I treat those I already have?