Sores under one breast

Hi. For over 5 years I have had these first small sores under my one breast.  Now it seems there is a bigger Mother Host. It gets very a lot of pus.  First my dr. gave me surgical soap and siad it would go away. Was caused by sweat. Well, now they are starting to grow up the side and top of breast and onto my upper stomach.  It's really weird, when they first appear, it's like there are 2 little split tails, like a fish tail. If I remove them with tweezers, then here comes the pus and the ssore stays and continues to grow.