Breast is one of the most important parts of a woman, it is not only a symbol of female figure and sexiness, but also a key to health, while the side breast is the first killer of female breast beauty and health. I. What is a side breast? Parametrium is the appearance of extra breasts in addition to the normal pair of breasts, usually in the front or underarm, but also in the upper and lower parts of the normal breast, abdomen, groin and other parts of the chest. The reason for the formation of parametrium is that during the embryonic period, there are 6 to 8 pairs of mammary glands growing on two lines from the armpit to the groin, and before birth, all of them are degenerated except for the pair in front of the chest. If, due to developmental abnormalities, these breast primordia do not completely degenerate, multiple breasts are formed, also known as polymastia. Parametrial breasts can appear as having breast tissue but no nipples, having both breast tissue development and nipples, or having no breast group but nipples. Most of them do not have any special sensation. In some cases, there is swelling and pain before menstruation, and the swelling and pain disappears after menstruation. The change of the parametrial breast is more obvious during pregnancy and lactation. Usually, during pregnancy and breastfeeding, the parametrium will increase significantly and even produce milk. After breastfeeding, the parametrium does not shrink, so it is more obvious. Second, what are the dangers of parametrial women’s health? 1, affect the beauty, embarrassing to wear: when wearing clothes, the armpit “two lumps of meat” will be exposed, especially in summer, in public, wearing suspenders, bras, etc. very embarrassing. 2.Swelling and pain, affect life: Parametrium is a lump formed by the blockage of lymphatic vessels and metabolites, “pain is not passable”, resulting in swelling and pain in the parametrium. Anxiety, emotional agitation, etc. 3, leading to breast hyperplasia: due to lymphatic duct blockage, the daily metabolic waste of breast cells will be retrograde upward with the axillary lymphatic exclusion, when the axillary lymphatic blockage, long-term stagnation in the breast formed hyperplasia. 4, induce breast lesions: breast metabolism must pass through the channel axillary lymph long-term can not be unblocked, can lead to mastitis, breast lobular hyperplasia, breast fibroids, breast cancer and so on. Third, how to get rid of the side breast? The surgery includes the removal of the parametrial breast, excess fatty tissue and skin, and then assisted with pressure bandaging. The minimally invasive method of paramyeloplasty is to remove fat tissue by fat aspiration, then use small incisions at the top of the armpit to remove excess glands and skin, and finally use liposuction techniques to make the area more flat, thus obtaining good surgical results. The surgery is usually elective, but patients should undergo surgery as soon as possible if they have the following conditions: 1. After one month, upper arm exercises should be performed to prevent scar contracture.