What is a mammogram and how should I prepare for one
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For informational purposes only
This answer was generated by AI grounded in NCCN guidelines and published medical literature. It is not medical advice. Always consult your oncologist or care team before making treatment decisions.
Sources & medical oversight
- Built by OpenCancer’s team of physician-scientists and cancer survivors.
- Last updated October 15, 2025. Informational only — not a substitute for your oncology team.
A mammogram is an x-ray imaging test used to screen for breast cancer in women. It allows doctors to look for abnormalities or changes in breast tissue that could indicate the presence of breast cancer, even before a lump can be felt.
Here are some tips for preparing for a mammogram:
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Schedule it a week after your period if possible, when breasts are less tender. Avoid the week before your period.
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Don't wear deodorant, powder, lotions or perfumes on the day of the mammogram as some contain substances that can create shadows on the x-ray image.
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You will need to undress from the waist up, so wear a two-piece outfit to make it easier.
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Tell the technician if you have breast implants, as different positioning may be required.
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Try to relax and take slow, deep breaths during the procedure. The technician will need to flatten the breast between two imaging plates which can be uncomfortable but doesn't last long.
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Be prepared to stay still and hold your breath for a few seconds while the images are taken.
Having a yearly mammogram after age 40 is an important screening tool, as it can detect breast cancers at an early, treatable stage. Don't hesitate to ask the technician any questions you may have.
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