Breast cysts are fluid-filled sacs inside the breast. They are usually noncancerous (benign). You may have one or multiple breast cysts. A breast cyst often feels like a grape or a water-filled balloon, but sometimes a breast cyst feels firm.
Breast cysts are common in women ages 35 to 50. They usually disappear after menopause, unless a woman is taking hormone therapy. Treatment usually isn't required. But if a cyst is large or uncomfortable, it can be drained with a needle.
