Thanks for your question. Duct ectasia of the breast often causes nipple inversion. It may be associated with difficulty in breast feeding a newborn. It is not known to cause any other problem other than those of occassional mastitis or fibrocystic disease. It can be self-limiting, in which case it should improve in a few months. You must be certain there are no breast lumps under the nipple or elsewhere on the breast. A mammogram maybe indicated if you are symptomatic or if a lump is felt. If there is inflammation, you will or should receive treatment (usually antibiotics). If there is no other problem but inversion of the nipple that continues to be a problem indicating the ducts that drain into the nipple are blocked or unopened, then there is a procedure to correct this problem. The procedure is usually done in an outpatient surgical facility under a local anesthesia. A small incision can be made in the areola under the nipple and the ducts are divided and separated from the nipple which is held in an "out"position and dressed to hold for a few days. Most plastic surgeons are familiar with this condition and offer this or similar procedures to help your condition. There is little noticeable scarring. The NHS Dr. may have thought your condition would not be permanent and therefor no surgery was necessary. If you continue to have inversion, then I advise you consult with a board certified plastic surgeon who will examine the problem and determine with you what can be done and what complications can occur. If both breasts have ductal ectasia then breast feeding probably cannot occur if you are considering this. Let me know if you have any other questions concerning this problem and if this answer helps answer your question, please click the "accept" button.
If there is no nipple inversion, inflammation or lumps in the breast, then no treatment or surgery needs to be performed.
I am glad to hear that the lump was benign. I believe that the Grade 3 inversion needs surgical attention because of the problems you are having. If the lump is small, it should be removed and the nipple separated from the tissue below. The surgeon must make sure that the nipple has good circulation so that it will survive.
You may have fibrocystic disease and the discharge is milky and related to hormones and/or sebaceous (natural oil glands in the skin and breast). You may need to see an Endocrinologist if the discharge and lumps continue. I advise you to express your concerns to the NHS physician and ask to see a Dr. or Surgeon who may be able to help this condition. If the doctors feel that the surgery is too dangerous for you or that it may result in nipple loss, sometimes there are other methods such as "suction apparatus" that can be applied and monitored, that can sometimes be used. Some breast or plastic surgeons may know about alternatives. You deserve to have this condition treated as best as possible. Best of luck in finding a solution to your "problem".