These are retention cysts of the breast. They are milk collections that accumulate behind plugged ducts. They are often painless unless when infected and can be quite large. They usually resolve soon after breast feeding is stopped. If very large and discomforting, it can be treated by aspiration or sucking out of the milk with a needle or by removal of the whole cyst by your doctor. Occasionally they may get infected resulting in an abscess which then require an urgent medical attention. For more information, please CHAT WITH OUR CONSULTANTS.
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Reference and further reading:
1. Lawrence R. Breastfeeding: A Guide for the Medical Professional, 7th ed, 2010.
2. American Academy of Pediatrics and the Americal College of Obstetrics and Gynecology. Breastfeeding Handbook for Physicians, Shanler, RJ (Eds), American Academy of Pediatrics, Elk Grove Villate, IL 2006.