I have some major pain in my left breast and nipple. I am tandem nursing and this is the side that my toddler nurses most of the time. I know that I have more milk on that side when I express. My newborn has had the perfect latch and we have had a great nursing relationship. I have some white colour on the end of my nipple as well as lots of pain. I am just curious if yeast can only strike the one breast and not the other. All the pain started today so it can still transfer to the other breast if it is yeast. I also have a golf size lump on my left breast that aches. I think this is a plugged duct from my huge milk supply from tandem nursing. What can i do to relieve this situation? Is this a plugged duct and threush?