I read that if you suddenly develop sore <span style = 'background-color: #dae8f4'>nipples</span>
after weeks or months of successful feeding, it is usually thrush (a kind of yeast infection). Apparenly, according to "The Nursing Mother's Companion", by Kathleen Huggins, R.N., M.S., a book which you should all get
if you do
n't have it, when you have symptoms like shiny, reddened, swollen, tender, and cracked nipples
and it develops after months of feeding successfully it is usually thrush.