This condition may make the breasts appear swollen or lumpy. AdenosisĪdenosis is a noncancerous breast condition characterized by enlarged lobules, which are the milk-producing components of mammary glands. They may also empty blocked milk ducts or surgically drain any abscesses that form in the breast. Health professionals treat mastitis using antibiotics. This condition most commonly affects women who are breastfeeding. A clogged milk duct or cuts in the skin can lead to infections. Mastitis causes inflammation in the breast due to an infection. The following sections will describe some health conditions that may affect the shape of a person’s breast. The breasts should return to their usual size once breastfeeding stops. Mammary glands can increase in size and number as a result of rising estrogen levels during pregnancy. Hormonal changes during pregnancy and breastfeeding can also cause swelling in the breasts. Over time, the body produces fewer reproductive hormones.Īccording to an article in the journal Dermato Endocrinology, decreasing estrogen levels leads to smaller mammary glands and the loss of glandular tissue.Īging also causes changes in skin elasticity, which may cause the breast to appear smaller or more elongated. This change occurs as a result of rising estrogen levels. It also plays a role in determining where the body stores fat.įemales may notice that their breasts swell just before they get their period. HormonesĮstrogen stimulates the growth of mammary glands. Other factors that may influence breast shape include: Body fatīreasts contain glandular, connective, and fat tissue.įat surrounds the milk-producing mammary glands and gives breasts their characteristic round shape. Genetics can play a role in determining the shape, tissue density, and size of a person’s breasts. Some people may wonder which factors contribute to breast shape. In a 2015 study in the journal Breast Cancer: Basic and Clinical Research, researchers found a significant correlation between prominent differences in breast volume and the risk of breast cancer.Īccording to the authors, people with breast asymmetry ratios - that is, the difference in breast volumes divided by the volume of the smaller breast - over 20% had a twofold increase in the risk of breast cancer. Causes include diseases of the breast tissue, the effects of certain medical treatments, and congenital factors.ĭoctors may find asymmetrical breast size or tissue density during a routine mammogram test or breast cancer screening. That said, a person should inform their doctor if they notice a change in the shape or size of one breast.Īccording to research, some adolescents may experience severe breast asymmetry. Having uneven breasts or nipples does not necessarily constitute a medical emergency. Other asymmetric breasts have minor differences that typically go unnoticed. Some people have one breast that is noticeably larger or smaller than the other. However, the degree of asymmetry will vary from person to person. The researchers found that the left breast was bigger than the right in 62% of these women. Researchers from the Emory University School of Medicine in Atlanta, GA, documented the dimensions of 87 women’s breasts. However, if a person is unhappy with how their breasts look or breast asymmetry is affecting their daily lives, they can see a doctor to discuss potential treatment options. Most people have slight breast asymmetry. Breast asymmetry occurs when one breast is a different shape or size to the other.
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