Hi, Just a couple other thoughts on the chronic plugged ducts as well as trying lecithin. Does this mother nurse as often or as long (thoroughly?) as on her days off at home. Could be incomplete emptying. Could also be increased stress from working, or lack of sleep as contributing factors perhaps. Also, is her wardrobe any different when she is at work? (straps on clothing, bags, purses, etc., tighter bras,). I had recurrent plugged ducts with child #2 because I was wearing bras from child #1 which no longer fit so well. The problem immediately resolved when I bought new bras. Hope this helps. Kris Rogers