1.When is the best time to go to the hospital for examination We suggest: (1) Women aged 18-35 years old should be examined by a doctor once every three years. (2) After the age of 35, women need to do a mammogram as a basis for future control. (3) Women older than 40 years of age, to be examined by a doctor once a year and to receive a mammogram or breast ultrasound, etc., if necessary. (4) Those with family and personal history of breast cancer should consult their doctors on the manner and frequency of checkups/reviews. (2) How to do self-checking? Summarize: First sight, second touch (touching the breasts and armpits), third squeeze (areola, nipple) Self-checking of the breasts is best done 7-10 days after menstruation. At this time, the estrogen in the body has the least effect on the breasts and diseases are most easily detected. Specific examination methods are: stand or sit in front of a mirror, face the mirror to compare and observe the two sides of the breasts, the size and shape of any asymmetry or outline changes, pay attention to the nipple with or without blood secretion, etc.; lying flat on the bed, the upper arm of the side to be examined high above the head, the back of the pad with a small pillow or a folded sheet or towel, the opposite side of the hand of the fingers of the palm of the finger to touch, the fingers together and put the level of the action of the gentle, do not heavy press or scratching, the touch The feeling of both breasts should be the same, if there is abnormality on one side, it can be further compared with the same part on the opposite side at the same time. Pay special attention to the upper and outer part of the breasts to feel whether there is any lump, thickening of glands or other abnormal changes because there are more chances of tumors occurring in the upper part of the outer part of the breasts, and if any lump is found, it should be consulted in time. Squeeze the areola and nipple: see if there is any abnormal fluid outflow, especially unilateral fluid flow, single-hole fluid flow, coffee-colored fluid or bloody fluid, if there is any indication that there may be lesions such as tumors in the ducts of the breasts, and you should consult a doctor immediately. Breast self-examination once a month, if abnormalities are found should go to a specialized hospital for further professional examination.