What causes breast tenderness before menstruation?

For women, breast health is extremely important; therefore, we must pay special attention to daily care to avoid unnecessary complications—particularly breast swelling and pain. The causes of female chest pain are highly complex and may be physiological or disease-related. Once it occurs, it inevitably affects our daily lives. So, what causes breast tenderness before menstruation?

What Causes Breast Tenderness Before Menstruation?

Breast pain before menstruation is a classic clinical manifestation of premenstrual syndrome (PMS). During the luteal phase—the second half of the menstrual cycle—fluctuations in estrogen and progesterone levels may trigger a range of noticeable symptoms. In addition to breast pain, these may include headache, backache, abdominal bloating, constipation, edema, mood changes, fatigue, sleep disturbances, and altered libido. Other possible symptoms include difficulty concentrating, reduced work efficiency, memory impairment, and irritability.

Pre-menstrual breast pain is primarily caused by a temporary hormonal imbalance—specifically, fluctuations in estrogen and progesterone levels. Under normal physiological conditions, the internal environment remains relatively stable. Estrogen promotes water retention, whereas progesterone promotes water excretion. Typically, these two hormones maintain a dynamic equilibrium through gradual, coordinated changes. However, just before menstruation, both hormone levels rise significantly and then drop sharply. Progesterone declines first, disrupting the hormonal balance and leading to sodium and water retention. This results in generalized swelling—including breast swelling—and associated discomfort such as tenderness and headache.

Patients are advised to maintain healthy lifestyle habits: keep warm, go to bed early and rise early, and avoid spicy or irritating foods. We hope this information proves helpful.