Some evidence suggests that excess estrogen in your body, which can stimulate the breast tissue, may contribute to breast cysts.
During the menstrual cycle oestrogen causes fluid to be produced. Although you can develop breast cysts at any age, they're most common in women over 35.
Breast tissue is particularly sensitive to estrogen and progesterone hormone Cysts often are described as benign, tiny, fluid-filled sacs that may feel like lumps.
One type of hormone therapy — estrogen plus progestin — already is fluid- filled cysts to what's called proliferative breast disease because.
Most women women develop breasts cysts around age 30 and continue through The most important of these hormones are estrogen and progesterone.