Quoting ~Isaiah's Mama~:" Okay so I exclusively pump, have for almost 9 months now. I don't actually breastfeed ever, just pump. ... [snip!] ... it looked more like mushy, creamy milk than puss. Does anyone know what this could be and if I should get it checked out?"
Quoting mommytoisaiah(+eden):" I'd get it checked out. I developed mastitis and a breast abscess after pumping and it sucked. I'd hate for yours to turn into something like that."
Quoting Bonny Creed:" Yes, I recommend getting it checked out. It could be a boil or an infection caused by bacteria in the ... [snip!] ... bacteria in the breast pump. In the meantime, it may not be recommended to use milk from that breast..it may be contaminated."