Bloating Before Period
Abdominal bloating in the days before your period is caused by rising progesterone and fluid retention. Learn what causes it, how to track it, and when it signals something more.
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
After ovulation, progesterone rises rapidly and acts on smooth muscle, slowing digestion and encouraging fluid retention. Oestrogen fluctuations in the late luteal phase can compound this, widening blood vessels and increasing water held in tissues. The result is a sensation of fullness, tightness, or visible distension — typically worst in the 3–5 days before your period begins, and resolving within a day or two of flow starting.
Track this symptom across your cycle
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Start free — no card neededHow to track it
Log bloating severity daily on a 0–3 scale alongside your cycle day. After two or three cycles you'll see a clear pattern — most women find the worst days cluster on days 24–28. Track alongside sodium intake, sleep, and stress, as all three can amplify luteal bloating. Seeing the pattern helps separate premenstrual bloating from digestive conditions that don't follow the cycle.
When to see a doctor
Bloating that is severe, persistent throughout your whole cycle, accompanied by significant pain, or associated with changes in bowel habits may indicate endometriosis, fibroids, irritable bowel syndrome, or ovarian pathology. If bloating doesn't reliably resolve within 2 days of your period starting, mention it to your doctor.
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Start tracking free →This content is for informational purposes only and is not a substitute for professional medical advice.