The love of beauty is in everyone’s heart! Spring has come, many girls have long been unable to tolerate the bloated down jacket to cover their slender body, can not resist to wear slim clothing, show their youthful and beautiful moving curves. But some people do not dare to wear sleeveless tops, because there is a “flab” under the armpits affect the appearance. This underarm trouble makes a lot of women in the dress code have regrets. What is this “flab”? Most people have what is known clinically as a parametrium. They are usually found in the front of the armpit or under the armpit, but also in the upper and lower parts of the normal breast, the abdomen, and the groin. In humans, like some advanced mammals, there are multiple mammary gland initiation units during embryonic life, with six to eight pairs of mammary gland primordia growing along two lines from the axilla to the groin. If some breast primordia do not degenerate completely, multiple breasts are formed, also known as polymastia, and incomplete degeneration of the axillary pair of primordia is more common, resulting in “paramomastia”. Most of them are swollen or elevated in the front or underarm, and they may have fully developed or incomplete nipples. Sometimes there is tough tissue within the parametrium, mostly developed glandular structures. Changes in the parametrial breast are more pronounced during pregnancy and lactation. Usually during pregnancy and lactation, the parametrium grows significantly and even produces milk. After breastfeeding, the parametrium does not shrink, so it is more obvious. The main concern of our friends is whether the parastetals need to be treated? Do they need surgery? Can they become cancerous? Aesthetics is a small thing, but cancer can be a big deal, so they are anxious to go to the clinic. In fact, this worry is not necessary. The main problem of the secondary breast is that it affects the aesthetics of the appearance, wearing clothes and social activities. When the appearance of the secondary breast is affected to this extent, surgery can be considered to remove it. As the breast contains breast tissue, there is a risk of developing breast cancer. However, the risk of developing cancer is not higher than that of the normal breast because it is a “secondary breast”. Therefore, it is not justified or necessary to remove the underarm side breast to prevent cancer. Because of the presence of breast tissue in the side breast, breast-related diseases can also occur, but in general, the principles of treatment are the same as those for common breast diseases. Because the cause of breast cancer is still unknown, the most important thing is to receive regular medical checkups and screening mammograms such as ultrasound and mammogram. The most important thing is to have regular checkups with a specialist and to receive regular screening mammograms such as ultrasound and mammography! The most important thing is to have regular checkups with your specialist and receive regular breast imaging such as ultrasound and mammogram! It’s important to say it three times! To summarize, parastomastia is a common congenital abnormality of breast development, which can be treated surgically if it affects the appearance; parastomastia can also cause disease, but parastomastia itself does not increase the chance of cancer, so there is no need to be afraid of having parastomastia!