“”

Women's Health, Your Way

May 06, 2026

Ask & Search With Clara

Welcome to a new standard for women’s health answers.

GIRLHOOD / The Period Flu Is Not a Joke

The Period Flu Is Not a Joke

The Period Flu Is Not a Joke

Is the period flu real? Asking for a friend who just took two Motrin and set an alarm so she could nap between meetings.

As I've mentioned before, I never used to get a regular period. PCOS meant my cycle showed up whenever it felt like it, sometimes every 60 days, sometimes not at all. So when I tell you I just had my second "normal" cycle in a row, you'd think I'd be celebrating. And I am, truly. Except that both times, on cycle day 1, I could not get out of bed.

Not ideal when you have three little kids and are running a business.

It turns out there's a name for this. "Period flu" isn't an official medical diagnosis — which feels like a personal attack — but it describes the cluster of flu-like symptoms that can arrive right before or at the start of your period: body aches, chills, nausea, and that trudging-through-mud fatigue where you can't tell if it's a cold, allergies, or just your uterus.

Prostaglandins are the main culprit. They're inflammatory compounds your uterus releases to shed its lining that occasionally decide to circulate beyond their assigned area and take the rest of your body down with them. And it's more common than anyone lets on.

Did you know painful periods are the leading cause of lost time from school and work among women of childbearing age — and about 10% are fully incapacitated for up to three days each month? So there are a lot of us out there, horizontal, alarm set, hoping nothing important comes up while we're snoring on the couch.

It helps to know I'm not alone. I just didn't expect "normal" to feel quite like this.

More from GIRLHOOD

Don't judge me, but my favorite trend on the internet right now is the whole notion that "cigarettes are back." Women aligning their chakras with a smoke and a cocktail, girls... Read more
"Everyone wants a village, but no one wants to be a villager." I keep seeing that on social media, and every time it stops me, probably because it's true in... Read more
In February, I was lying on the exam table at my annual, underwear tucked under my jeans on the chair in that way that makes absolutely no sense, catching up... Read more
I still can't get over how often women with regular cycles get their periods. I'm apparently one of them now: after years of cycles that showed up whenever they felt like it,... Read more

The Trip We Didn't Take

My husband and I were supposed to be in Portugal this week. Our friends were getting married, we had the tickets booked, and then his new job made it impossible... Read more
When I had my twins, my company gave me four and a half months of paid maternity leave, and I was so grateful I could have cried — which, given... Read more
This week, mid-facial, my esthetician asked if she could pluck my chin hairs. I said yes, obviously, and then we started talking about all of the things we have to... Read more
When I was maybe ten or eleven, before I knew I could write, I was convinced I was going to be a fashion designer. Or a makeup artist. The plan... Read more
It's National Infertility Awareness Week, which means I've been thinking a lot about the version of me who sat in a fertility clinic waiting room at 28 — college-educated, completely... Read more
Are we looking at ourselves too much? No, like, that's a serious question. Maybe it's the fact that I'm in my "late" 30s now. Maybe it's four hours of Zoom... Read more