Sudden Breast Growth In 40s. Large breast cysts can put pressure on nearby breast tissue causing breast pain or discomfort. That is why you will notice your breasts begin to become softer and heavier.
That s why most health experts suggest starting annual screening mammograms at this. As you age the tissue and structure of your breasts begin to change. Hormones can also increase the fat content within the breast over the long term.
With age there s also an increasing risk of abnormal growths in the breast.
Experts don t know what causes breast cysts. It s normal for breast tissue to become less glandular and more fatty as you get older which makes them feel less firm and full. In your 40 s is when you will truly notice the changes your breasts have made over time. As you grow older your breast tissue gradually becomes more fatty.