Anecdotally only, several things seem to be a factor in chronic
plugged ducts and they are related to inadequate breast drainage:
        an improperly fitting bra and/or a bra that is worn 24 hours a
day.  (This is something that is rarely volunteered by mothers when they
give a history.)
        infrequent changing of nursing position, relying only on
1 or 2 positions, usually the cradle hold
        long intervals between nursing, often due to nipple soreness

I like to try to fix the above before looking for more complicated causes.

Sarah

Sarah Friend Barnett   LLLL, IBCLC
Bronx (New York City), NY  -  [log in to unmask]
" You are not obliged to finish the task,
 neither are you free to neglect it."       R. Tarfon