Why You Might Gain Weight Around Your Period

If you’ve ever stepped on the scale around your period and noticed a few extra pounds, you’re not alone. But what’s going on here? Does your period make you gain weight? Or is it just a coincidence?

We talked with Ob/Gyn Alison Stalzer, MD, about why your weight may change throughout your cycle.

Why period weight gain happens

Things like hormonal changes, water retention and other factors may mean that you’ll notice changes in your weight around your period.

“Most women experience some type of weight gain or fluctuation during their cycle, but it’s not necessarily been scientifically proven,” Dr. Stalzer says.

Still, there are some reasons why it could make sense for your cycle to impact your weight. Dr. Stalzer shares a few.

Hormonal fluctuations

The hormone progesterone rises after you ovulate (when your ovaries release an egg). That could play a role in period-related weight gain.

After all, progesterone levels are also very high during pregnancy — a time when weight naturally increases.

“Progesterone fluctuates throughout your cycle,” Dr. Stalzer explains. “When progesterone is high, your body may be more prone to holding on to weight.”

Progesterone peaks after you ovulate and stays elevated until you start bleeding. So, if that change affects your weight, you should see it decline after your period begins.

Water retention

Bloating and puffiness are common symptoms of PMS, arriving right before you start your period.

Why? That increase in progesterone just before your period starts can make your body more apt to retain water. And that can add a few pounds to the scale.

Diet and exercise

Cramps, fatigue and other period woes can throw your healthy habits for a loop.

“A small amount of weight gain could just be related to the fact that when you have your period, you might be more inclined to eat more salty food or sweets and not be as active as usual,” Dr. Stalzer points out.

Comfort eating and lowered activity around your period can contribute to short-term weight gain.

Normal day-to-day fluctuation

It’s important to note that daily weight fluctuations can affect anyone. And it’s not just due to your menstrual cycle. Meals, hydration and even bowel movements can affect your weight at any given time.

Your weight isn’t a stagnant thing, and it’s very normal for it to change a bit from day to day, even throughout the day.

“Say you have a large, salty meal. You might be two or three pounds heavier the next day, but then that goes away,” Dr. Stalzer illustrates. “Your weight is constantly in flux.”

In other words, your period may not be what’s influencing the scale.

Tips to manage period-related weight gain

Day-to-day weight changes are normal. And if you notice the scale tick up around your period, there are some steps you can take to help.

Here’s what Dr. Stalzer recommends:

• Staying hydrated: Drinking plenty of water helps flush out excess sodium (salt) and reduces bloating. It can also help keep your belly full so you don’t reach for calorie-dense foods.
• Limiting salty and processed foods: Sodium can encourage water retention and bloating. Instead, try to eat more foods high in fiber and protein to keep you feeling full and satisfied.
• Staying active (even a little): Gentle activities like walking and stretching can relieve period-related discomforts. They can also help reduce bloating, boost your mood and curb cravings.

Above all, don’t stress about the scale. Weight fluctuations are normal. If daily changes in your weight are upsetting, try to avoid fixating on daily weigh-ins, especially during your cycle.

That said, if your weight changes more than 5 pounds during your cycle, it’s worth discussing with a healthcare provider.

“Usually, period-related weight gain is nothing to write home about. Around 2 to 5 pounds is completely normal,” Dr. Stalzer reassures. “If you’re consistently gaining more than that, it’s probably worth further investigation.”