Preparing for a mammogram is straightforward: skip deodorant and lotion, wear a two-piece outfit, and schedule your appointment when your breasts are least tender. Most of the preparation happens in the days and hours before you arrive, and getting it right helps ensure clear images and a more comfortable experience.
Skip Deodorant, Lotion, and Powder
This is the single most important preparation step. Many deodorants contain aluminum, and those dense metallic particles show up on a mammogram as bright white specks that look identical to calcifications, the tiny calcium deposits that radiologists examine closely for signs of cancer. If aluminum residue is scattered across your image, the radiologist may not be able to distinguish real calcifications from deodorant artifacts, potentially leading to a callback for repeat imaging or unnecessary worry.
Natural deodorants aren’t necessarily safe either. Products made with charcoal, baking soda, zinc, or plant extracts can also leave particles in the underarm area that create the same problem on imaging. Body lotions, especially “glowing skin” formulas with metallic shimmer, pose a similar risk. Even a basic lotion causes issues beyond imaging interference: it makes your skin slippery, which makes it harder for the technologist to position your breast on the compression plate. Compression works best when the breast stays firmly in place, and any slipping can blur the image.
On the morning of your mammogram, wash your chest and underarm area and leave the skin bare. If you’ve already applied deodorant, some facilities provide wipes, but it’s better not to risk it.
Wear a Two-Piece Outfit
You’ll need to undress from the waist up for the exam and change into a gown. Wearing a separate top and bottom means you can keep your pants, skirt, or shorts on the entire time, which most people find more comfortable than standing in just a gown. Skip necklaces or chains that hang near your chest, since you’ll need to remove them anyway.
Time It With Your Cycle
If you still menstruate, the CDC recommends avoiding the week before your period and the week of your period for scheduling. Hormonal changes during that window cause breast swelling and tenderness, which makes compression more uncomfortable and can also make breast tissue appear denser on the image. The best time is typically the week after your period ends, when hormone-related swelling is at its lowest.
If you no longer have a menstrual cycle, any time works.
Bring Your Prior Images
If you’re going to a new facility or switching providers, request your previous mammogram images ahead of time. Radiologists compare your current images to older ones to track any changes in your breast tissue over time. Without that baseline, they’re reading your scan in isolation, which can make it harder to judge whether a finding is new or something that’s been stable for years.
Your old images are stored at the facility where they were taken. You’ll need to sign a release form to get them. Most places provide images on a CD or flash drive, and some can transfer them digitally to your new facility. Request them at least a week or two before your appointment to allow processing time. If you’ve had mammograms at multiple locations over the years, your most recent prior images are the most useful to bring.
Consider a Mild Pain Reliever
Mammograms involve compressing each breast between two plates to spread the tissue thin enough for clear X-ray images. This lasts only a few seconds per image, but some people find it genuinely painful rather than just uncomfortable. If you’ve had a painful experience before, or you’re nervous about it, taking an over-the-counter pain reliever like ibuprofen or acetaminophen about 30 to 60 minutes before your appointment can take the edge off. This isn’t required, and many people get through the exam without it, but it’s a reasonable option.
Know What to Tell the Technologist
Before imaging begins, the technologist will ask you some questions, but there are a few things worth mentioning proactively:
- Breast implants. Mention this when you schedule, not just when you arrive. Facilities need experience with implant imaging, and your appointment will take longer. Women with implants get four extra images (two per breast) using a technique where the implant is pushed back against the chest wall so the technologist can capture the breast tissue in front of it. That’s eight images total instead of the standard four.
- Pregnancy or possible pregnancy. Mammograms use low-dose radiation, and your provider needs to know.
- Recent vaccinations. Some vaccines can temporarily cause lymph node swelling in the armpit, which could be mistaken for an abnormal finding.
- Any lumps, skin changes, or new symptoms. If you’ve noticed something specific, point it out so the technologist can make sure that area is captured clearly.
- Pain during compression. If the pressure feels intense, say so. The technologist can adjust. Compression should be firm but not unbearable.
If You Have a Physical Disability
Standard mammography equipment assumes you can stand upright and raise your arms, which creates real barriers for people who use wheelchairs or have limited upper body mobility. Unfortunately, there are no universal accessibility standards for mammography clinics, and the experience varies widely depending on the facility and its staff.
Call ahead and be specific about your needs. Ask whether the facility has adjustable-height equipment, whether the technologist has experience positioning patients with mobility limitations, and whether you’ll need to bring your own attendant to help with transfers. Some people bring a personal care attendant and work with the technologist to find positioning that works using supports like foam blocks. It may take extra time and some creative problem-solving, but getting the screening done is worth the effort of finding a facility that can accommodate you.
Current Screening Recommendations
The U.S. Preventive Services Task Force recommends screening mammograms every two years starting at age 40 and continuing through age 74. This applies to all women at average risk. If you have a family history of breast cancer, dense breast tissue, or other risk factors, your provider may recommend starting earlier or screening more frequently. Your first mammogram establishes the baseline that all future screenings will be compared against, which is one reason starting on schedule matters.