Why “I Feel Fine” Isn't the Whole Story About an Asthma Attack
October 22, 2026
Before you read — 10 seconds: True or false: if you can still talk in full sentences, your asthma attack can't be serious.
a) True b) False
Most people judge an asthma attack by how it feels. For a lot of people, that works.
It does not work for everyone.
Doctors have a term for this: some people are poor perceivers. Their airways can narrow a long way before they feel much different. They are not imagining things and they are not being tough about it. Their body simply does not send a strong warning.
This matters most for people who have had a severe attack before. If you have ever been hospitalized for asthma, or ended up in intensive care, you are more likely to be someone whose symptoms lag behind what is actually happening in your lungs.
This is what a peak flow meter is for
A peak flow meter is a small handheld device. You blow into it as hard and as fast as you can, and it gives you a number. That number reflects how open your airways are at that moment.
The number on its own does not mean much. What matters is comparing it to your own personal best — the highest number you can reach when your asthma is well controlled. That is why it helps to know your best number before you ever need it.
If your care team has suggested tracking your peak flow, this is why.
Quick check: What does a peak flow meter actually measure?
a) How much air your lungs hold b) How fast you can push air out c) The oxygen level in your blood
Answer: How fast you can push air out of your lungs — which reflects how open your airways are right now.
When to get help right away
You can only get out single words, not full sentences
You are leaning forward to breathe, or using your neck and shoulder muscles
You feel sleepy, confused, or hard to rouse
Your peak flow is far below your usual best
Those last two especially. Feeling drowsy during an asthma attack is not you calming down.
What this is not
None of this is a reason to change your medicines on your own. It is a reason to ask your care team two questions at your next visit: What is my personal best peak flow? And at what number should I call you?
Those two numbers turn a guess into a plan.
Talk to us about an asthma review
If you are not sure of your personal best, or you have never been given a number to call us at, that is worth twenty minutes with the team.
Call (847) 860-7250.
Never change or stop a medication on your own. Talk to your care team first.
The answer
False. Speaking in full sentences is reassuring, but it is not proof. Some people feel relatively well while their airways are significantly narrowed.
This article is for education only and isn't a substitute for medical care. Questions about your situation? Call the office — we're happy to help.