Keeping a Peak Flow Diary
Your peak flow rate is a way to see how well your lungs are working, based on how forcefully you can blow into the peak flow meter.1
A Peak Flow Diary helps you to keep track of your asthma, because your symptoms and peak flow readings will generally correlate.
It’s normal for your peak flow to vary a bit, from day to day and from morning to night, so it’s the overall pattern of your readings that’s important rather than the figures themselves.1
If you don’t have a peak flow meter or diary, but would like one, ask your doctor or nurse at your next asthma appointment.
Approval code: RESP-IE-NP-00089
Date of preparation: November 2020
- Peak Flow Diary. Asthma UK. Available at: https://www.asthma.org.uk/globalassets/health-advice/resources/adults/your_peak_flow_diary.pdf Last accessed: November 2020.