What does a fibroadenoma feel like?

Some fibroadenomas are so small they can’t be felt. When you’re able to feel one, it’s very distinct from the surrounding tissue. The edges are clearly defined and the tumors have a detectable shape. They’re moveable under the skin and typically not tender. These tumors often feel like marbles, but may have a rubbery feel to them.
The exact cause of fibroadenomas isn’t known. Hormones such as estrogen may play a part in the growth and development of the tumors. Taking oral contraceptives before the age of 20 has been associated with a higher risk of developing fibroadenomas as well.

These tumors may grow, particularly during pregnancy. During menopause, they often shrink. It’s also possible for fibroadenomas to resolve on their own.

Some women have reported that avoiding foods and drinks that are stimulants — like tea, chocolate, soft drinks, and coffee — have improved their breast symptoms. Even though this is worth trying, there are no studies that have scientifically established a link between ingesting stimulants and improving breast symptoms.