Breast Tenderness Before Period
Sore, swollen, or tender breasts in the days before your period are a common luteal phase symptom driven by hormonal shifts. Here's what causes it and when to get checked.
Medical disclaimer
This content is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Dawn Phase is not a medical device. Always consult a qualified healthcare professional with questions about your health.
What causes it
Rising oestrogen and progesterone in the luteal phase cause breast tissue to swell and become more sensitive. Oestrogen stimulates growth of breast ducts; progesterone stimulates development of the milk-producing lobules. Both effects cause engorgement and tenderness. The symptoms typically peak in the 3–5 days before menstruation and resolve rapidly once the period starts and hormone levels drop.
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Start free — no card neededHow to track it
Log breast tenderness daily on a simple severity scale. Tracking the start and end day relative to your cycle helps confirm a cyclical pattern. Note whether tenderness is bilateral (both sides) — cyclical breast pain is almost always bilateral and symmetrical, which distinguishes it from breast pathology, which is usually localised.
When to see a doctor
See a doctor if breast pain is localised to one area, non-cyclical (present throughout the month), associated with a lump, nipple discharge, or skin changes, or if it began after starting a new medication. Cyclical breast pain linked to hormonal fluctuations is common and rarely sinister, but new or one-sided pain warrants evaluation.
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Log symptoms daily and see how they connect to your cycle phases.
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