I did'nt notice a real bad smell. Kind of musty. I have pain all around my breast after squeezing. I had quit a bit of pain before it came back, but with the kind of work I do I overuse my arm and the pain seems to go away with rest. Thank you for your reply.
When you popped the pimple did you happen to smell anything that resembled rotted feet? If so then it is a cyst but nothing to worry over. The green tint and blood could have been from the cyst getting infected from popping it. I have similar one under my breast thats been there for years you can get them removed with a local but thats easy for me to say as I live in Canada and its free for any procedure that I need.