What Is Breast Asymmetry? Causes and What's Normal
Feeling a little uneven? You're not alone. Most women have some degree of breast asymmetry.
Breast asymmetry simply means that your breasts differ in size, shape or position. For most women the difference is subtle. For others it's more noticeable, especially after life events such as pregnancy, breastfeeding or hormonal changes.
Breasts are naturally unique, and these variations are normal. They're nothing to be embarrassed about.
What causes breast asymmetry?
Breast development: Breasts can grow at different rates during puberty, which can leave natural differences in size or shape.
Hormonal changes: Fluctuations during puberty, pregnancy or menopause can cause temporary changes in breast volume, and one breast may respond differently from the other.
Pregnancy and breastfeeding: If one breast has produced more milk, the breasts may shrink unevenly afterwards.
Weight fluctuations: Gaining or losing weight can affect each breast differently.
Body structure: Conditions such as scoliosis or Poland syndrome, or natural differences in the ribcage or chest wall, can influence breast position and volume.
Breast surgery or medical treatment: Procedures for breast cancer or other chest conditions, and some medical treatments, can alter breast shape or volume.
When should I get a change checked?
Long-standing asymmetry is usually nothing to worry about. However, if you notice a new or sudden difference in size or shape, a lump, or changes to your skin or nipple, speak to your GP.
Further support and information
You can learn more about breast asymmetry and related conditions through:
Finding your balance
Asymmetry can affect how clothes fit and how you feel. Find out how breast asymmetry can affect you, and how to restore balance.
