If available, bring your prior mammogram images and report with you so the radiologist can compare them to your new images. The day of your exam, avoid using deodorants, antiperspirants, powders, lotions, creams or perfumes under your arms or on your breasts. Metallic particles in powders and deodorants can interfere with the imaging.
If you’re premenopausal, your breasts may be more tender/swollen around the time of your period, which can cause extra discomfort during the mammogram. As such, you may want to consider scheduling your scan one to two weeks after the last day of your period.