One day you feel great, and the next — well, you just don’t feel like yourself. You’re crampy, bloated, moody and craving a plateful of carbs.  

You’re not alone. These symptoms are part of what is known as premenstrual syndrome, or PMS, and 69% of women ages 25-34 say period symptoms often keep them from doing the things that are important to them.1  

For most women, premenstrual symptoms can start anywhere from one to two weeks before their period begins. Symptoms can vary from woman to woman and may include: 

  • Pain: Cramps, backache, headaches or migraines, other aches and pains

  • Digestive problems: Bloating, nausea or upset stomach, diarrhea

  • Feelings: Stress, not feeling like yourself, trouble sleeping, fatigue

  • Other: Food cravings, swelling, acne

These symptoms usually disappear once your period starts. For some women, though, certain symptoms of PMS, such as painful cramping, may last for the first few days of their period.


In a survey of women aged 13-54 & mothers of daughters aged 13-17:

pink text that reads "more than 90% of women experience some PMS symptoms"
yellow text that reads "PMS symptoms are most common for women in their 30's"
pink text that reads "84% of young women report pain during their periods"
yellow text that reads "58% say period symptoms keep them from the things that are important to them"
pink text that reads "90% say their period affects their mood"
yellow text that reads "78% say they don’t feel like themselves"
pink text that reads "68% say it impacts their time at work or school"

What Causes PMS?

It's not exactly clear, but there may be several factors that can have an impact, such as: 

  • Chemical changes in the brain

  • Changes in hormones

  • Stress

  • Vitamin and mineral deficiencies

  • A diet high in salty foods

  • Drinking alcohol and caffeine

Get Back to Feeling Your Best

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  1. Isobar (2019). A&U Study. Unpublished.