Yes. Birth control medications contain the hormones estrogen and/or progesterone. In women of menstruating age these hormones may lead to the development of breast lumps. Although most of these lumps are benign, all breast lumps should be examined by a physician to rule out the possibility of cancer.
No. Birth-control pills are not known to cause breast lumps. In some women who already have fibrocystic, lumpy breasts or fibroadenomas, the lumps may increase in size and become more tender on birth-control pills.