The breasts are complex tissues, comprising glandular, adipose, and highly vascularized components. They are also traversed by a dense lymphatic network, particularly in the subclavian and axillary regions. This structure makes them particularly sensitive to hormonal fluctuations, as well as to congestion or circulatory stasis.
Hormonal fluctuations
Breast tissue is directly influenced by estrogen and progesterone. During the menstrual cycle, these hormones regulate vascular permeability and cell proliferation in the milk ducts. This can lead to fluid retention, a sensation of swelling, and increased sensitivity, particularly in the second half of the cycle, before the onset of menstruation.
Congestion and Lymphatic Circulation
Since the breasts are richly vascularized and drained by the lymphatic system, any disruption to this circulation can lead to congestion. Reduced circulation can lead to fluid buildup in the tissues, causing feelings of tightness or heaviness. Lymph node areas, particularly under the armpits, play a key role in this drainage.
Physiological changes: pregnancy, breastfeeding
Certain stages, such as puberty, pregnancy, or breastfeeding, are accompanied by significant changes in breast tissue. The development of milk glands and an increase in breast size can heighten sensitivity in the area and cause occasional discomfort.
Breast tissue sensitivity
Breast tissue is particularly sensitive and can react to various stimuli. This natural sensitivity explains why certain areas may become more reactive or uncomfortable at certain times.
Breast size and mechanical stress
Large breasts can cause tension in the breast tissue and supporting ligaments. The weight of the breasts can intensify feelings of tightness, especially at the end of the day or during certain movements, which can contribute to the onset of pain.
Benign changes in breast tissue
Some women may experience benign changes in breast tissue, such as cysts or mastosis. These changes can make certain areas more sensitive or painful, particularly during hormonal fluctuations.