I just wanted to post my experience with repeated blocked ducts, usually in the same spot. I was getting them every few days and it was draining me greatly. My son eats lots and I felt like I was in bad shape between the milk production and the constant blocked ducts. I talked to my doctor and lactation consultants and I posted on this board and nothing worked consistently. Lecithin might have worked, but the nurse practitioner gave a lower dosage than recommended on websites, so I was worried to take it at higher dosages. Then I stumbled upon a comment about food intolerances leading to blocked ducts. Cow's milk was the most common food intolerance and so I tried eliminating milk and dairy from my diet. Amazingly, I've had no blocked ducts while I avoid dairy! I had some cheesecake a few weeks ago and "boom!" got a blocked duct.
I really don't understand the connection (the nurse practitioner told me its just coicidence, but I don't buy that), but it worked for me. I thought I would just share my experience so that others could know about the possible connection.
Hope this helps someone!
Carrie