Breast Self-Examination

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Breast Self-Examination

Test Overview

A breast self-examination (BSE) involves checking your breasts to help detect breast problems or changes. Many breast problems are first discovered by women themselves, often by accident. Breast lumps can be non-cancerous (benign) or cancerous (malignant). Breast cancer can occur at any age, though it is most common in women older than 50.

Many experts believe that the harms of breast self-examination outweigh the benefits. The Canadian Cancer Society no longer recommends doing or not doing regular breast self-examinations (BSE), but it does recommend that women be familiar with how their breasts look and feel and to talk to their doctors about any changes. Talk with your doctor about breast self-examination.

A breast self-examination involves checking your breasts for lumps or changes while standing and lying in different positions and while looking at your breasts in a mirror to note any changes in their appearance. Once you know what your breasts normally look and feel like, any new lump or change in appearance should be evaluated by a doctor. Most breast problems or changes are not because of cancer.

If you choose to do breast self-examinations, this should not replace regular clinical breast examinations (CBE) by a doctor and mammograms. Breast implants do not decrease a woman's risk for breast cancer, so women with breast implants need to talk with their doctors about performing breast self-examinations.

Why It Is Done

A breast self-examination is done to detect breast problems, such as a lump or change in appearance, that may indicate breast cancer or other breast conditions that may require medical attention (such as mastitis or a fibroadenoma).

How To Prepare

No special preparation is needed before having this test.

How It Is Done

It takes practice to perform a thorough breast self-examination. Ask your doctor for tips that can help you perform a breast self-examination correctly.

The best time to examine your breasts is usually one week after your menstrual period begins, when your breast tissue is least likely to be swollen or tender. If your menstrual cycle is irregular, or if you have stopped menstruating due to menopause or the removal of your uterus (hysterectomy), do your examination on a day of the month that's easy to remember. Women who are pregnant or breast-feeding can continue to examine their breasts every month. Breast-feeding mothers can examine their breasts after a feeding or after using a breast pump so that the breasts have as little milk as possible, making the examination easier and more comfortable.

To do a breast self-examination, remove all your clothes above the waist and lie down. The examination is done while lying down so your breast tissue spreads evenly over your chest wall and is as thin as possible, making it much easier to feel all your breast tissue.

Use the pads of the three middle fingers of your left hand—not your fingertips—to check your right breast. Move your fingers slowly in small coin-sized circles.

Use three different levels of pressure to feel all of your breast tissue. Light pressure is needed to feel the tissue close to the skin surface. Medium pressure is used to feel a little deeper, and firm pressure is used to feel your tissue close to your breastbone and ribs. A firm ridge in the lower curve of each breast is normal. Use each pressure level to feel your breast tissue before moving on to the next spot.

Check your entire breast using a lengthwise strip pattern. Feel all of the tissue from the collarbone to the bra line and from the armpit to the breastbone. Start in the armpit and work down to the bottom of the bra line. Move one finger-width toward the middle and work up to the collarbone. Repeat until you have covered the entire breast. Repeat this procedure for your left breast. See a picture of BSE using an up-and-down pattern.

You also can examine your breasts using a spiral pattern. Again, use three different levels of pressure to examine all your breast tissue. Avoid lifting your fingers away from the skin as you feel for lumps, unusual thicknesses, or changes of any kind. See a picture of BSE using a spiral pattern.

Most breast tissue has some lumps or thick tissue. When in doubt about a particular lump, check your other breast. If you find the same kind of lump in the same area on the other breast, both breasts are probably normal. Pay attention to any lump that feels much harder than the rest of your breast.

If you find anything that concerns you, schedule a visit with your doctor. The important thing is to learn what is normal for you and to report any changes to your doctor. Remember that most changes you find are not breast cancer but should be checked. These changes may include:

  • Any new lump. It may or may not be painful to touch.
  • Unusual thick areas.
  • Sticky or bloody discharge from your nipples.
  • Any changes in the skin of your breasts or nipples, such as puckering or dimpling.
  • An unusual increase in the size of one breast.
  • One breast unusually lower than the other.

In addition to examining your breasts while lying down, you may also check them while in the shower. Soapy fingers slide easily across the breast and may increase your chances of detecting a change. While standing in a shower, place one arm over your head and lightly soap your breast on that side. Then, using the flat surface of your fingers—not the fingertips—gently move your hand over your breast (in the strip pattern described above), feeling carefully for any lumps or thickened areas.

How It Feels

A breast self-examination (BSE) normally does not cause any discomfort. If your breasts are tender because your menstrual period is about to begin, a BSE may cause slight discomfort when you press on your breasts to feel for lumps.


The risk of doing breast self-examination is that you find a breast change that makes you anxious and may lead to unnecessary tests (such as a biopsy) but that turns out not to be cancer.


A breast self-examination (BSE) involves checking your breasts to help detect breast problems or changes.

Breast self-examination (BSE)


It is important to know what your breasts normally look like and feel like so you can identify any changes as soon as possible. One breast is usually slightly larger than the other. You may find a ridge of firm tissue in the lower curve of the breast below the nipple. This is normal. You may also notice that your breasts change throughout your menstrual cycle, and you may notice increased swelling and tenderness before your period starts.

Both breasts have a similar consistency and there are no new lumps since your last self-examination. You may have breasts that feel lumpy throughout. If both breasts feel this way, this is normal for you.

You may be able to express a clear or milky discharge from your nipple. This may be due to nursing, breast stimulation, hormones, or some other normal cause.

If you have small breasts, you may feel your rib as a firm mass through your breast tissue. If you follow the curve of firm tissue, you will be able to tell it's your rib and not a mass.



Abnormal changes are those that are unusual for you. The colour or feel of your breast or nipple may change. This can include wrinkling, dimpling, thickening, or puckering or an area that feels thickened.

A nipple which previously pointed out now points in (inverted). A red, scaly rash or sore may be found on the nipple. Nipple discharge is green or bloody.

A new lump can be felt in breast tissue. Most lumps are pea-sized. If you find a lump, don't panic; 8 out of 10 lumps are not cancerous. A lump is most often caused by a cyst, a fibroadenoma, or generalized breast lumpiness (fibrocystic breast changes), none of which are cancerous.

If you find a lump or other unusual change, make an appointment with your doctor to have it checked. Be prepared to describe whether the lump is hard or soft and whether it moves easily under the skin. If your doctor does a clinical breast examination (CBE), he or she may recommend that you watch for changes and reexamine the breast in several weeks, sometimes waiting until after your next menstrual cycle. More testing, such as a mammogram, a breast biopsy, or an attempt to remove fluid from inside (aspirate) the lump, may also be done. The lump is a cyst if the fluid inside is not bloody and if the lump disappears after aspiration.

What Affects the Test

Reasons why the results may not be helpful include:

  • Changes in your breasts or breast tenderness that occur during your menstrual cycle.
  • Examining your breasts at different times in your menstrual cycle. This may make it difficult to compare results of one examination with those of another.
  • Having fibrocystic lumps. These may make a breast self-examination difficult because lumps occur throughout the breast. The fibrocystic lumps can also become tender before your menstrual cycle.

What To Think About

  • The Canadian Cancer Society no longer recommends doing or not doing regular breast self-examinations (BSE), but it does recommend that women be familiar with how their breasts look and feel and to talk to their doctors about any changes.
  • An apparently normal breast self-examination does not rule out breast cancer. Breast self-examinations should not replace regular clinical breast examinations by a doctor and mammograms. For more information, see the topics Clinical Breast Examination and Mammogram.
  • If you have a breast lump that you are concerned about, see your doctor to determine the cause. Remember, most breast lumps are not caused by cancer. A breast biopsy may be needed to fully evaluate a breast lump. For more information, see the topic Breast Biopsy.
  • A pad, the breast self-examination (BSE) pad, is available for use as an aid in breast self-examination. The sensor pad is made of two layers of plastic with a small amount of liquid silicone inside. It is supposed to make breast lumps easier to detect by reducing the amount of rubbing (friction) between the fingers and the breast skin. The sensor pad is available without a prescription at many pharmacies.

Other Places To Get Help


Canadian Cancer Society
10 Alcorn Avenue
Suite 200
Toronto, ON  M4V 3B1
Phone: (416) 961-7223
Fax: (416) 961-4189
Web Address:

The Canadian Cancer Society (CCS) is a national, community-based organization that provides information about cancer prevention, care, and treatment. The CCS also provides funding for cancer research.

Related Information


Other Works Consulted

  • American Cancer Society (2009). Prevention and Early Detection: American Cancer Society Guidelines for the Early Detection of Cancer. Atlanta: American Cancer Society. Available online:
  • U.S. Preventive Services Task Force (2002). Screening for breast cancer. Available online:


By Healthwise Staff
Primary Medical Reviewer Sarah Marshall, MD - Family Medicine
Primary Medical Reviewer Brian D. O'Brien, MD - Internal Medicine
Specialist Medical Reviewer Kirtly Jones, MD, MD - Obstetrics and Gynecology
Last Revised March 28, 2011

This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information.