How to get rid of a hard lump under the breast mainly depends on the cause of the lump. Usually, when a lump appears on a woman’s chest, the common diseases include breast fibroids, cystic hyperplasia and breast cancer, and the first step to determine the nature of the lump is to have a mammogram. Generally speaking, patients with cystic breast hyperplasia can be treated with medication, i.e. conservative treatment, usually with prolotherapy or breast disease spirit; while for breast fibroids or breast cancer, they must be removed surgically and sent for intraoperative freezing examination.