First of all it is quite common for women to have changes in the breast tissue especially related to menstruation. Women who are not menopausal are encouraged to repeat an exam after their next period. If the lump persists or exam remains different one should see their healthcare provider. Those women who are menopausal, it is best to be evaluated by their healthcare provider anytime that a lump is suspected. In addition to mammogram a breast ultrasound is often performed and a consultation with a surgeon will likely be recommended. Remember- most changes and/or lumps found on exam are not cancer.