Timely and correct breast examination is of great significance for early detection and early diagnosis of breast diseases. The position of breast examination can be in sitting position or supine position. Breast examination can be done in sitting position and supine position. Observe whether the shape and size of the breasts are symmetrical; whether there is any protrusion or indentation on the surface of the breasts; whether the nipples are shrunken or elevated; whether the skin of the breasts is red, edematous, orange peel-like or eczema-like; whether the superficial tendons of the breasts are enlarged; and whether there is any indentation of the skin of the breasts; if there is any indentation of the skin of the breasts, the patient can raise the arms above the head or elevate the whole breast with her hands, so that the indentation part will be more obvious. Palpation Choose sitting or lying position according to the need. Examine the healthy breast first and then the affected side for comparison. The correct way to do this is to place all four fingers together and gently touch the breast with the flat of the fingers, and not to grasp or pinch it with the fingers, as the pinched glandular tissue may be mistaken for a breast lump. The order is to touch the whole breast first, then touch the four quadrants of the breast in a certain order: upper inner, upper outer (including the tail of the armpit), lower outer, lower inner quadrant, then touch the areola, squeeze the nipple to see if there is any fluid overflow from the nipple. Finally, palpate the axilla, subclavian supraclavicular region. Notes on palpation: 1. When a lump is found in the breast, the location, number, shape, size, texture, border, surface, activity, and pressure pain should be clarified; 2. To identify whether the lump is adhered to the skin, the skin near the lump can be gently lifted up by the fingers to determine the presence of adherence; 3. The time of checking the breast should be chosen in the 7th to 10th day of menstruation, which is a relatively stable period for the physiological changes of the breast. This is a relatively stable period of breast physiological changes, and any lesions can be easily detected; 4. To determine the nature of a lump, it is also necessary to combine age, medical history and other auxiliary examination results.