First Time User? Enroll now.
*Vaccine availability and appointments* | Additional COVID-19 Resources | Testing
Please be aware that mask-wearing is required at all UNC Health facilities.
Home > Health Library > Asthma Zones
Asthma zones are part of your asthma action plan. The zones are defined by your symptoms, your peak flow, or both. Knowing what zone you're in can help you know how well your asthma is under control and if you need help.
The three zones are:
Green means good. This zone is where you want to be.
When you're in the green zone, one or more of these things may be true:
Yellow means caution. If you're in this zone, it may mean you're having an asthma attack or that your medicine needs to be increased.
When you're in the yellow zone, one or more of these things may be true:
Red means DANGER. If you're in this zone, you may be having a severe asthma attack. Being in the red zone is dangerous. If you're in the red zone, you need to take action right away.
When you're in the red zone, one or more of these things may be true:
Knowing what asthma zone you're in can help you know what kind and how much medicine to take and when to call for help.
Current as of:
March 9, 2022
Author: Healthwise StaffMedical Review: John Pope MD - PediatricsAdam Husney MD - Family MedicineLora J. Stewart MD - Allergy and Immunology
Current as of: March 9, 2022
Author: Healthwise Staff
Medical Review:John Pope MD - Pediatrics & Adam Husney MD - Family Medicine & Lora J. Stewart MD - Allergy and Immunology
To learn more about Healthwise, visit Healthwise.org.
© 1995-2022 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
Our interactive Decision Points guide you through making key health decisions by combining medical information with your personal information.
You'll find Decision Points to help you answer questions about:
Get started learning more about your health!
Our Interactive Tools can help you make smart decisions for a healthier life. You'll find personal calculators and tools for health and fitness, lifestyle checkups, and pregnancy.
Feeling under the weather?
Use our interactive symptom checker to evaluate your symptoms and determine appropriate action or treatment.