Menstrual Cramps (Dysmenorrhea)

What Menstrual Cramps Are

The mechanism runs through prostaglandins, hormone-like compounds released in the uterine lining as it breaks down at menstruation. Studies have found elevated prostaglandin levels in the menstrual fluid and endometrial tissue of women with dysmenorrhea, and the strength of uterine contractions tracks with how much prostaglandin is released.^[1] Those contractions raise baseline uterine tone and briefly cut blood flow to uterine tissue, and that short supply of oxygen is what produces the pain, sometimes along with nausea.^[1][4] Researchers distinguish primary dysmenorrhea, cramps without an associated condition and about 90% of cases, from secondary dysmenorrhea, where an underlying cause is identified.^[1]

How It's Logged

Cramps are a logged symptom. You rate how strong the cramping felt on a given day, and each rating becomes a dated data point. Over a few cycles, those points draw the shape of your own pattern: which cycle days cramps land on, how long they run, and how one cycle compares with the next.

Why People Track Cramps

Pain is easy to forget once it passes, so a dated log beats memory for seeing the pattern. Tracking shows whether cramps arrive on the same cycle days each month, how they line up with flow, sleep, and mood, and how this cycle compares with the last six. Research on dysmenorrhea documents effects on mood and sleep quality during menstruation, which is exactly the kind of cross-metric pattern a combined log can surface.^[2] A dated record is also a concrete thing to bring to appointments.

For tracking mood and symptoms together in one place, see tracking your cycle, mood, and symptoms in one app.

How Go Go Gaia Tracks Cramps

Go Go Gaia logs cramps with a 1-click severity rating, no typing required. The app charts your ratings against cycle phase, flow, sleep, and every other metric you track, so recurring patterns show up on a timeline instead of living in your memory.

What the Research Shows

Prevalence estimates vary widely with how studies define and measure dysmenorrhea. A review of epidemiological studies reports rates from 16% to 91% among people of reproductive age, with severe pain in 2% to 29%. The same review found prevalence declines with advancing age and after childbirth, and that family history was the strongest predictor across studies.^[3]

A critical review in Human Reproduction Update puts primary dysmenorrhea at 45% to 95% of menstruating women and documents measurable effects on quality of life, mood, and sleep during menstruation compared with pain-free days.^[2]

On timing, research describes pain starting within a few hours of the onset of bleeding, peaking around 24 to 48 hours after bleeding begins, and typically resolving within 72 hours.^[1]

Related Terms

Frequently Asked Questions

Educational information based on published sources. Not medical advice. For personal concerns, please consult your doctor.

What causes menstrual cramps?

Prostaglandins released in the uterine lining around menstruation make the uterus contract. Research has found elevated prostaglandin levels in the menstrual fluid and endometrial tissue of women with dysmenorrhea, and the contractions briefly reduce blood flow to uterine tissue, which produces the cramping pain.^[1]

How common are menstrual cramps?

Very common, though estimates vary widely with how studies define and measure them. A review of prevalence studies reports dysmenorrhea in 16% to 91% of people of reproductive age, with severe pain in 2% to 29%. Prevalence tends to decline with advancing age and after childbirth.^[3]

When do cramps usually start and stop?

Research on primary dysmenorrhea describes pain beginning within a few hours of the start of menstrual bleeding, peaking around 24 to 48 hours after bleeding begins, and typically resolving within 72 hours.^[1]