Cystic mastitis, also known as mammary dysplasia, is a breast condition that causes lumps or cysts to form in the breast tissue. Other terms used to describe this condition include fibrocystic breast disease, benign breast disease, and mammary gland cysts. All these terms refer to noncancerous breast changes that can cause discomfort, pain, and swelling. Although cystic mastitis is not a serious condition, it can interfere with a woman's quality of life. Therefore, it's important for women to seek medical attention if they notice any breast changes or abnormalities. Treatment options for cystic mastitis include pain relief medication, hormone therapy, and surgery.