A breast self-exam is a simple check you can do at home to get familiar with how your breasts normally look and feel, so you’re more likely to notice if something changes. The entire process takes about five minutes and involves two parts: looking in a mirror and feeling the tissue with your fingertips. Here’s how to do both thoroughly.
When and How Often to Check
Once a month is a good rhythm. If you menstruate, the best time is a few days after your period ends, when hormonal swelling and tenderness are at their lowest. Your breast tissue will feel least lumpy during this window, making it easier to notice anything unusual. If you’re postmenopausal, pregnant, or have irregular periods, pick the same calendar day each month so it becomes routine.
The Visual Check
Stand in front of a mirror with your shirt and bra off, arms relaxed at your sides. Look at both breasts for anything that’s new or different from last month. You’re scanning for changes in size or shape, skin that looks dimpled or puckered (like the surface of an orange), areas of redness or rash, visible swelling, or a nipple that has recently turned inward.
Now raise both arms overhead and look again. Then press your palms firmly on your hips and flex your chest muscles. These positions shift the breast tissue and can reveal dimpling or contour changes that aren’t visible when you’re relaxed. Most people’s breasts aren’t perfectly symmetrical, and that’s normal. What you’re looking for isn’t perfection; it’s change from your own baseline.
The Physical Exam: Lying Down
Lie on your back with a pillow under your right shoulder and your right arm behind your head. This position spreads the breast tissue evenly across the chest wall, making it thinner and easier to feel through. Use the pads of your three middle fingers on your left hand, not your fingertips.
Move your fingers in small circles, about the size of a coin, and use three distinct levels of pressure at each spot before moving on:
- Light pressure feels the tissue just beneath the skin.
- Medium pressure reaches the deeper tissue in the middle of the breast.
- Firm pressure presses all the way down to the chest wall and ribs.
Pick a pattern that covers every inch of the breast. One common approach is to imagine your breast divided into wedges like slices of a pie. Start near your collarbone at the outer edge and work inward toward the nipple, then move to the next wedge and repeat. Another method is to move your fingers in vertical strips from your collarbone down to the bottom of the breast, shifting over slightly with each pass. Either pattern works as long as you don’t skip areas. Switch the pillow to the other side and repeat with the opposite hand.
Don’t Forget Your Underarm
Breast tissue doesn’t stop at the edge of your breast. A strip of tissue called the axillary tail extends from the upper outer area of each breast into the armpit. Breast cancer can develop in this region, so it needs to be part of your exam. While you’re lying down, keep your arm raised and use the same three pressure levels to feel the tissue in your armpit and along the side of your chest, all the way up to your collarbone.
Checking Your Nipples
Gently squeeze each nipple between your thumb and index finger. You’re checking for any discharge, which could be clear, milky, yellow, or bloody. Also note any new scaling, crusting, or skin texture changes on the nipple or the darker area around it. A nipple that has recently started pulling inward, or pointing in a direction it didn’t before, is worth noting.
Repeating the Exam Standing Up
Many people find it helpful to do a second round of the physical check while standing, often in the shower. Wet, soapy skin lets your fingers glide more easily and can make subtle textures more noticeable. Use the same small circles, three pressure levels, and systematic pattern you used while lying down.
What Normal Tissue Feels Like
Breast tissue is naturally bumpy. Some people have lumpier, more textured breasts than others, and that’s completely normal. The key comparison points are your other breast and your own history. If both breasts feel similarly lumpy in the same areas, that’s your baseline. Tissue often feels grainier near the armpit and thicker along the lower curve of the breast.
Hormonal changes throughout the month can make breasts feel temporarily swollen, tender, or more nodular. This is why checking at the same point in your cycle each month matters. Over two or three months of regular exams, you’ll build a mental map of what’s normal for you, and deviations will be much easier to spot.
What Feels Different From Normal
A concerning lump typically feels distinctly harder than the surrounding tissue. It may feel like a small rock or a firm pea that stands out from the texture around it. Early on, a lump like this is often movable, becoming less so over time. The important distinction is that it feels different on one side compared to the other, or different from the rest of the breast.
Other changes worth paying attention to include thickening of the skin in one area, persistent pain in a specific spot that doesn’t come and go with your cycle, new swelling that doesn’t match the other breast, or nipple discharge that appears without squeezing. Not all lumps are cancer. Most are benign, such as cysts or fibroadenomas. But any new, distinct change is worth having evaluated.
Breast Self-Exams for Men and Trans Individuals
Men can develop breast cancer, though it’s far less common. Warning signs include a painless lump or thickening on the chest, skin dimpling or puckering, nipple changes such as scaling or inversion, and discharge or bleeding from the nipple. The same visual and physical techniques apply: look for skin changes, then use your fingertips to feel the tissue around and behind the nipple.
Transgender men who have had chest surgery should get familiar with the look and feel of the skin and remaining tissue on their chest and report any new changes to their care team.
What a Self-Exam Can and Can’t Do
The American Cancer Society notes that research has not shown a clear benefit of breast self-exams in reducing breast cancer deaths, particularly for people who are also getting regular screening mammograms. Mammograms can detect tumors too small to feel by hand, often years before a lump becomes noticeable.
That said, a meaningful number of breast cancers are first noticed by the person themselves, not during a scheduled screening. The real value of a monthly self-exam isn’t as a substitute for mammography. It’s the familiarity it builds. When you know what your breasts normally feel like, you’re far more likely to recognize a change early and act on it quickly. Think of it as one layer in a broader awareness habit, not a standalone screening tool.