Some female friends often because of the bulging armpit “meat ball” and trouble, hot summer dare not wear camisoles and other sexy clothing, this annoying lumps or bulges in the end what is it? This is the formation of the parametrial breast, there are congenital and acquired causes, all people may occur, the incidence of women is about 2% to 6%, more women than men (the ratio is about 5:1), can occur in the armpit to the root of the thigh line at any location, most of the bilateral onset, can also be unilateral onset. They are often underdeveloped tissues and may have a deepened red skin pigmentation, thickened skin, or even a secondary nipple. What are the hazards of secondary breasts? 1, affect the aesthetics of the appearance of the secondary breast, the first thing we feel the biggest harm is to affect the aesthetics, this piece of abrupt “flesh” often become the need to cover up the embarrassing parts, especially in the summer, accidentally exposed, it will be a joke; 2, pain In addition to the appearance of the trouble, the secondary breast may also be accompanied by pain, this is due to the secondary breast in the This is due to the fact that the glands in the parametrial gland can change with the hormone level of the human body, swelling, pain, and in severe cases, may affect the activities of the upper limbs. Therefore, diseases that can occur in the normal breast can also occur in the parammary gland, such as breast enlargement, breast fibroadenoma and even breast cancer. Compared to the normal breast, the parametrial gland has a higher chance of malignancy and is prone to metastasis, but is often overlooked.