How to keep a daily asthma diary

First, record your peak flows in the appropriate asthma zone so that you can refer to them easily.

Personal best PEF: _________

Green zone:

Asthma is well-controlled. There are no asthma symptoms. You (or your child) can complete regular activities and sleep without coughing, wheezing, or difficulty breathing. PEF is 80 to 100% of personal best.

My green zone is _____to _____

Yellow zone:

A flare-up, or asthma is poorly controlled. Cough, wheeze, shortness of breath, or chest tightness may be present. PEF is 50 to 80 percent of personal best.

My yellow zone is _____ to _____

Red zone:

A severe flare-up or medical emergency. Symptoms are: frequent cough, severe shortness of breath, trouble talking, rapid breathing, wheezing, and difficulty sleeping. Start emergency asthma medication immediately and call your asthma care provider. If there is no change after starting the medication, go to the emergency room.

My red zone is ____________

To complete the diary

  • Fill in the date each day.
  • Perform PEF as instructed.
  • Fill in your or your child's PEF reading using the peak flow meter. Measure PEF before taking asthma medications.
  • Compare your PEF readings to the asthma zones listed above. Follow instructions on the Asthma Action Plan.
  • Fill in the amount of rescue medication (MDI or nebulizer) used over the past 24 hours.
  • Rate any asthma symptoms you or your child had during the day.
  • Remember to take your asthma daily diary with you to appointments with your doctor or health care provider so they can review it with you.

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