Premenstrual syndrome (PMS)

Learn more about PMS, including the symptoms, causes, management options and when to see your doctor.
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What is PMS?

PMS refers to the symptoms you might feel in the week or 2 before your period starts.

Most women have one or 2 symptoms. Once your period starts, the symptoms usually go away.

PMS is very common in teenage years and during perimenopause.

PMS is different to premenstrual dysphoric disorder (PMDD), which is a condition that causes severe emotional and psychological distress.

Symptoms of PMS

PMS symptoms can be emotional, physical or both – everyone is different. Symptoms can also vary from one cycle to the next, but they generally follow a pattern over time.

What causes PMS?

It’s not yet known exactly why PMS happens. But it may be due to hormone changes in the body before a period.

Some women may be more sensitive to these changes than others.

Some research suggests PMS may be linked to overlapping factors, including:

  • brain sensitivity to hormone changes during the menstrual cycle
  • genetic factors
  • stress
  • inflammation.

Managing PMS

There are many ways to manage PMS symptoms, including a healthy lifestyle and certain medicines.

When to see your doctor

It’s important to see your doctor if your periods or PMS impacts your normal activities, like school or work, relationships and quality of life.

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