A breast-self exam is similar to a clinical breast exam, except you do it yourself. The technique for performing a breast self-exam has changed over the years. It was once suggested that women perform the entire exam while standing up. But it's now known that it's best for women to lie down for part of the exam. Lying down allows the breast tissue to spread out evenly over the chest. This makes it easier to feel all of the breast tissue.
Choose a time when your breasts are least tender — usually a few days after your period has ended.
There are three positions for performing a thorough breast self-exam.
LYING BACK WITH A PILLOW OR FOLDED TOWEL UNDER YOUR RIGHT SHOULDER:
1. Place your right hand behind your head.
2. Examine every part of your right breast:
- Use the pads of the three middle fingers of your left hand to feel for lumps, bumps, or thickening.
- Move from spot to spot on your breast using a straight up-and-down pattern.
- Press each spot using a small, circular motion.
- Use three levels of pressure in each spot — light, for the breast tissue near the surface, medium, for the tissue underneath, and firm, for the tissue that is closest to the ribs.
3. Now switch positions and feel the left breast with your right hand, making sure to examine all parts of the breast using the up-and-down pattern.
STANDING UP IN FRONT OF A MIRROR:

1. Place your hands on your hips.
2. Look at each breast for changes in size, shape, and form.
RAISING YOUR RIGHT ARM SLIGHTLY TO THE SIDE:

1. Examine the underarm with your left hand.
2. Feel for lumps, bumps, or thickening in the same way as you examined your breasts.
3. Repeat with the other underarm.
How and when women check their breasts vary. There are some women who perform breast self-exams regularly, and some women who do self-exams from time to time. Other women leave all breast exams to their health care provider.
Knowing your breasts may help you notice changes sooner. But if you find a change in your breasts, it does not necessarily mean you have cancer. There are many other, less serious problems that can cause breast changes such as cysts, infections, or injuries. You should report any changes you find to your health care provider as soon as possible.