How to perform a breast self-exam.
Breast care is an important aspect of a woman’s health. By regularly examining your own breasts, you are more likely to notice any change in the way your breasts look or feel. Talk to your doctor about the benefits and limits of this screening tool, and review your breast self exam technique.
Lying down Click here to view image 
Place a pillow or folded towel underneath your right shoulder and place your right hand behind your head. With the finger pads of your left three middle fingers, feel for lumps in the right breast. Press firmly enough to know how your breast feels. A firm ridge in the lower curve of each breast is normal. Move around the breast in a circular, up and down line, or wedge pattern.
Repeat the same procedure for the left breast. Be sure to do the exam the same way every time, check the entire breast area, and remember how your breasts feel from month to month. If you find any changes, see your doctor right away.
Shower check Click here to view image
Raise one arm and check your breasts by pressing firmly with the pads of your fingers. Move your fingers in a spiraling motion toward the nipple. Make sure to include the armpit are a. Half of all breast cancers develop in the part of the breast closest to the armpit. Now check your left breast with your right hand in the same way.
In
the mirror Click
here to view image 
As you stand in front of a mirror, look at the appearance of your breasts while holding your arms in three different positions: with your arms at your side, with your hands behind your head, with your hands on your hips. Look for any dimpling of the skin, changes in the nipple, redness or swelling.
What to do if you find something
If you discover any lumps or changes in your breasts, you should report your findings to your doctor immediately. Most breast lumps are not cancer, and are due to benign breast conditions. Medical examinations and tests may be the only way to determine their cause.