Fibrocystic changes are so common they are considered normal in most cases. There is no known prevention.
Women with certain fibrocystic changes have an increased risk of developing breast cancer in the future. This risk of breast cancer can be about five times greater than the risk in women who do not have such changes. Notably, most women with fibrocystic disease do not have these unusual changes.
Fibrocystic changes are not contagious and pose no risk to others.