I believe that some people will have two pieces of flab in front of their armpits when they wear clothes, and many people call it a side breast, but in fact, strictly speaking, it could be just flab. So what are side breasts? For both women and men, parametrium has a great impact on health and aesthetics. It is a redundant breast that is located outside of the normal mammary glands and in other parts of the nipple line. In the 6th week of embryonic development, the breast buds on both sides of the anterior wall of the torso develop into a pair of normal mammary glands; after the 9th week, the breast buds on the other segments of the “breast line” do not completely degenerate and develop into mammary tissue to form paramomastia. Do side breasts only exist in the anterior or underarm area? No. Paramomastia can occur not only in the “breast line” but also in the ear, face, neck, scapular area, midline of the chest and abdomen, dorsal thighs and pubic area, etc. This is due to the vagrant breast line tissue outside the “breast line” during embryonic development. The most common location is under the axilla, at or below the end of the normal mammary gland. There are three main types of parametrium: 1. with breast tissue and no nipple. 2. 2. nipple without mammary tissue. 3. with nipple and breast tissue. Parametrial breasts with glandular tissue are affected by the same sex hormones as normal breasts. In addition to the shape of the parametrium and the presence or absence of breast tissue, parametrium can sometimes be divided into true parametrium and pseudo parametrium depending on the cause of the parametrium. Pseudoparasitic: Most of them are caused by acquired obesity or improper dressing that results in localized fat accumulation in the outer chest or armpits; True parasitic: Most of them are caused by congenital factors and have breast tissue that develops into extra breasts or nipples after birth. How to distinguish whether it is a parastet or fat? Pseudoparasitic breasts formed later in life are mostly caused by acquired obesity or improper dressing, which can cause localized fat in the outer chest or armpits in the long run. In contrast, most congenital parametrial breasts have breast tissue, some of which can become swollen and painful during menstruation, pregnancy and breastfeeding, and some nipples may even secrete milk. Therefore, if you want to confirm whether it is a parametrial breast, you need to go to a professional hospital to have a professional doctor to examine it. Treatment of parametrial breast: 1. Parametrial aspiration: A small incision of 2 to 3 mm is made under the armpit, and the parametrial tissue is removed by a method similar to liposuction, which is suitable for cases where the parametrial breast is mainly fat. 2. Paramastectomy: Suitable for cases where the parametrium is mainly glandular or even has adenoma. Generally, a 4-5 cm incision is made in the armpit to remove the parametrial tissue. After surgery, local pressure dressing is needed to reduce exudation and promote the role of retraction and shaping. The parametrium is not functional, but only grows large and affects the appearance, and some of them feel swollen and painful with menstruation. The principle of paramastectomy is to make a small incision under the armpit to aspirate or remove the parammary gland tissue, with the purpose of removing the non-functional residual organ, the parammary gland, and improving the appearance of the armpit. Therefore, it is important to go to a regular hospital to be diagnosed and operated by a professional doctor when performing a paramastectomy.