We have a client who has been nursing well for 7 weeks and has
 begun having "excruciating, stinging pain" in one breast only that
 begins a few minutes into the feeding and lasts for about an hour
 afterwards. She says it begins in the breast behind the nipple and
 follows a line (along a duct?)at the bottom or inside of one breast.
 This was a phone interview, so we have not seen the breast.  She says
 she has no nipple pain or redness, and that there are no symptoms of
 thrush - no rash, white spots in mouth no vaginal yeast infection.
Also
 no fever, red streaks, or nipple trauma visible. We told her we would
 ask on the Lactnet to see if anyone has an idea or suggestion about
 this.  She just saw her MD.  Any ideas? We'd really appreciate your
 input.  Thanks!
 Anne and Margaret in VA (Hosp. based IBCLCs).