Period diary

Photo of a young woman on a sofa, writing in a diary

Heavy periods can affect your daily life and lead to anemia. Keeping a period diary can help you to get an idea of how much blood you lose during that time of the month.

It can be helpful to keep a record of how many pads and tampons you need on different days of your period over one or two months. This allows you to estimate how much blood you tend to lose during your period. You will find a PDF of our period diary here.

The thumbnail image shows the diary sheet that you can fill in to help you estimate how much blood you lose during heavy periods.

This is how you can fill in the diary:

  • In the top left corner of the table, enter the date on which your period started.
  • In the rows beneath that, write down how many pads and/or tampons you used on each day of your period. You can note how full the pads or tampons were, and which size(s) you used.
  • If you use a menstrual cup or period underwear, you can cross out the pads and/or tampons in the table and enter these products instead. Make a note of the volume or absorption capacity of the products you use and how often you had to empty or change them.
  • You can also record whether your period had clumps of blood in it or not.
  • Assess how bad your pain was on each day: Was it mild, moderate or severe?
  • If you used any medication, you can write down the name, dose and number of tablets you took.
  • Use the last column of the table to record any other symptoms or problems that you noticed.

Important: You can either fill in the diary digitally, or print it out and fill it in by hand.

Keeping a period diary not only helps you get an idea of how much period blood you lose: The severity and type of symptoms may help to find out what’s causing your heavy periods, too. The diary can also help you keep track of how much medication you took.

You can take your filled-in diary to your next appointment and discuss it with your doctor there.

Period diary

PDF (One A4 page)

Download file

IQWiG health information is written with the aim of helping people understand the advantages and disadvantages of the main treatment options and health care services.

Because IQWiG is a German institute, some of the information provided here is specific to the German health care system. The suitability of any of the described options in an individual case can be determined by talking to a doctor. informedhealth.org can provide support for talks with doctors and other medical professionals, but cannot replace them. We do not offer individual consultations.

Our information is based on the results of good-quality studies. It is written by a team of health care professionals, scientists and editors, and reviewed by external experts. You can find a detailed description of how our health information is produced and updated in our methods.

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Created on February 25, 2025

Next planned update: 2028

Publisher:

Institute for Quality and Efficiency in Health Care (IQWiG, Germany)

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