The breasts develop from childhood through adolescence and adult life, so it is normal to notice breast changes over time. In this section, the Canadian Breast Cancer Foundation provides you with information about some normal breast changes that you may experience at different stages in your life:
Adolescence. When girls’ breasts grow during adolescence, it is possible for breast lumps to form. Such lumps are usually part of normal breast development.
Menstrual period. Cyclical pain is breast pain that occurs around the time of the menstrual period and is related to hormonal changes. The intensity of the pain can vary and can occur in one or both breasts. The breasts may also become larger or feel lumpy.
Pregnancy. During pregnancy, the breasts change in preparation for breastfeeding. They become larger and firmer. The areola becomes darker, and the nipples become larger. The breasts may also feel tender or more sensitive.
Breastfeeding. During breastfeeding, the breasts can change size several times a day. After breastfeeding stops, the breasts may continue to secrete fluid for a few months or up to one or two years.
Menopause. After menopause, the body produces lower levels of estrogen. This can change the composition of breast tissue and cause the breasts to become less firm, less dense and to change shape. The breasts may also change in size after menopause.
You may also experience benign (noncancerous) breast conditions, most of which do not increase your risk of breast cancer or require treatment. However, a few of these conditions have been linked to an increased risk of developing breast cancer.
The Canadian Breast Cancer Foundation encourages women and men to be breast aware: know how your breasts normally look and feel, know what changes to look for, and discuss any unusual breast changes with a health care provider.
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