Not sure if this will help, but here is an article with a list of potential causes for recurrent blocked ducts and some suggested treatments that you can try.
Some of the suggested treatments include:
- Taking supplements such as vitamin C and consuming adequate amount of fluids
- daily therapeutic breast massage (http://bfmedneo.com/our-services/breast-massage/ or http://www.askdrsears.com/topics/feeding-eating/breastfeeding/common-problems/plugged-milk-ducts)
- Acupuncture
You have probably read through many articles and I hope some of the suggestions may help.
If hand expressing has been helping you drain fully, perhaps you can consider investing in a better pump since that may be the cause of the problem.
Hang in there mummmy! All the best!!
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