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 don't require treatment unless a cyst is large and painful or uncomfortable. In that case, draining the fluid from a breast cyst can ease symptoms. Although breast cysts can be found in women of any age, they're more common in women before menopause, typically under age 50. But they can be found in women of any age. Breast cysts also commonly occur in postmenopausal women who take hormone therapy.Symptoms
Breast cysts may be found in one or both breasts. Signs and symptoms of a breast cyst include:
Having breast cysts doesn't increase your risk of breast cancer. But having cysts may make it harder to find new breast lumps or other changes that might need evaluation by your doctor. Your breasts may feel lumpy and painful when you're menstruating, so it's important to be familiar with how your breasts feel throughout your menstrual cycle so that you'll know if something changes.