A, self-examination of the breast position 1, check the breasts when bathing: bathing, the skin surface is moist, the skin is smooth after rubbing soap, which is conducive to the detection of abnormalities. 2, check the breasts in front of the mirror, check to choose a brightly lit place, fully expose both sides of the breast, facing the mirror. Check the two upper limbs up, pay attention to whether there is a local bulge or depression in the breast and whether there is a change in the nipple, then cross your arms and check whether there is any change in the breast after making the pectoral muscles tense, pay special attention to whether both sides of the breast are symmetrical, and for asymmetrical changes, great attention should be paid. 3, check the breasts when lying down: lying down flat, check the right breast is a small thin pillow on the back of the right shoulder, the right hand pillow under the head, so that the breast tissue is more evenly exposed, easy to check. When examining the left breast, the four fingers of the right hand are placed close together, flattened, gently touching the breast, and in a certain direction, in order to check. The time of the examination Before the examination, attention should be paid to selecting a date, preferably in the middle of the two menstrual periods. Because at this time the breast is less congested and soft, it is easier to feel the lump. The correct way to check your breasts is to gently touch your breasts with your fingers together, not to grab and pinch them, otherwise you will easily mistake normal breast tissue for lumps. The palm of the hand should be flat and the four fingers together, and the most sensitive index finger, middle finger and ring finger should be used to gently touch the breast in order. Fourth, the contents of the visual examination of the breast: first of all, we should see whether our two breasts are symmetrical, whether the color of the skin has changed, and whether the nipples are invaginated or overflowing. 1.Breast shape: Take off your shirt, face the mirror, cross your arms or lift them up over your head, and repeat several times to observe whether the outline of your breasts is complete and symmetrical, and whether there are any abnormalities in the outline. 2.Breast skin: Observe whether the skin of the breast is smooth, whether the color is normal, whether the skin has dilated veins and edema, whether the skin has dotted depressions (or orange peel-like changes) and regional depressions (dimple sign). 3. Nipples: check whether the height of both nipples is on a horizontal line, whether the color of both nipples and areolas is the same, whether the skin of the nipples is peeling or erosion, and whether the nipples are elevated or have retraction. 4. Chest wall: whether there are large dark brown disease-like protrusions on the chest wall from the outer top of the nipple to the inner bottom of the nipple, to be considered as possible parametrium or paramecium. Fifth, the order of self-examination touching the breast From the outer upper, outer lower, inner lower, inner upper area of the breast, and finally the nipple and areola area in the middle of the breast, as the outer upper part of the breast can extend to the armpit, do not ignore it during the examination. Small lumps are not easily palpable and can be examined by holding the breast and using the right hand to look. The lump in the lower part of the breast is often covered by the sagging breast, so use the left hand to hold up the breast or lie down and raise the arm, and use the other hand to look for it, and finally squeeze the nipple and pay attention to whether there is any liquid outflow, and then check both sides of the armpit in the same way, paying attention to whether there are enlarged lymph nodes.