Asthma Attack Symptoms: What an Attack Feels Like and What to Do

Medical review pending. This page is general information and does not replace emergency care. Named reviewer: Dr. Mohammad Fawzi Katranji, consultant pulmonologist.

Asthma attack symptoms: the quick answer

Asthma attack symptoms start within minutes: the airways tighten, and pushing air out becomes work. Cough, wheeze, chest tightness and breathlessness arrive together, and a sentence can take three goes to finish. A reliever inhaler should ease all of it.

A reliever that does not work is the signal to call 998 in the UAE. Keep that rule ahead of everything else here, because the steps on this page only help while the reliever is still doing something.

You may be reading this at 3am with the inhaler in your hand, or the morning after, trying to work out whether what woke you was an attack. Neither question needs a diagnosis first. The page takes them in order: what an attack feels like, how long it lasts, what to do in the first minutes, the signs that mean 998, the review afterwards, the triggers and how to lower the risk of the next one.

The NHS wants anyone who has had an attack reviewed within two days, and that is the step most people skip.

If the last attack came and went without anyone checking your inhaler technique, book an appointment for a review.

Key takeaways

• Cough, wheeze, chest tightness and breathlessness that stop you finishing a sentence are the usual signs, and a reliever should ease them within minutes.
• The NHS sets the reliever dose at 1 puff every 30 to 60 seconds, up to a maximum of 10 puffs, shaken between puffs and used with a spacer if you have one.
• With no improvement after 10 minutes and no ambulance on the way, NHS guidance says to repeat the same maximum dose, and never to drive yourself to hospital.
• A mild episode can last a few minutes, and a severe one can run for hours or days, according to the American College of Allergy, Asthma & Immunology, so an attack measured in hours is not a mild one.
• Book a review within two days of any attack, says the NHS, and ask for inhaler technique and a lung function test to be covered there.

What an asthma attack feels like from the inside

Inside the airway, the muscle wall tightens, the lining swells, and mucus collects, so the tube carrying air out gets narrower. Cleveland Clinic describes the process as airways that swell, narrow and fill with mucus.

Breathing out carries the cost, because the air has less room to leave, and the next breath in has to shift what is left. That is why the effort feels like pushing, and why a chest can look busy without moving much air.

From your side, it may show up as a band around the chest that will not loosen, a whistle on the way out, or a cough that has outlasted the cold which started it. Some people wake at night and find that sitting up is the only way to get a full breath.

Not every attack makes a noise. University of Utah Health names silent asthma, where the cough and the wheeze are missing, and the breathing still feels wrong. A quiet chest can still be a tight one, so the sound is a clue, and its absence settles nothing.

No checklist of symptoms proves asthma on its own, and a normal chest examination between attacks does not settle the question. How asthma is confirmed, and what the wider pattern looks like over weeks, sits in asthma symptoms in adults. For the sound itself and the other conditions that produce it, see what wheezing sounds like.

How long an asthma attack lasts

The length depends on how narrow the airway already was when the trigger landed. The American College of Allergy, Asthma & Immunology puts a mild episode at a few minutes, and a severe one at anything from hours to days.

A reliever should be working within minutes, so ten minutes without a response is the point to act. If the first dose has not touched it by then, another hour at home is the decision that costs time.

Duration shifts with the trigger and with how inflamed the airways were that week, so a short attack today says little about the next one. Treat the length as a pointer to severity, and let the reliever's response and the warning signs carry the rest.

An attack that wakes you at night is worth mentioning at the review even when it lasted a few minutes, because the timing says something about how well the asthma is controlled.

How to ease an asthma attack: the first minutes

The steps follow national emergency guidance, and the numbers stay inside what that guidance covers. If you are with someone who is struggling, do these with them, keep talking to them and stay with them. You do not need to know whether it is asthma to act on this, because a reliever that is not working is enough to call.

1. Get upright and stay there. Sit up, loosen a tight collar or scarf and stay where someone can see you. University of Utah Health gives the same first move to anyone helping: help the person sit upright and use their usual treatment.
2. Shake the reliever and take 1 puff. NHS guidance sets the sequence at 1 puff every 30 to 60 seconds, up to a maximum of 10 puffs. Shake the inhaler again between puffs.
3. Send every puff through a spacer if you have one. A spacer is the chamber that sits between the inhaler and your mouth, and it takes the timing out of each puff. If you do not own one, ask about it at the next review.
4. Follow your own plan where it differs. A written plan may be built around a different device, or around an inhaler that combines preventer and reliever. Where the plan is written for you, the plan's maximum is the one to use.
5. Repeat the same maximum dose after 10 minutes if nothing has changed. Do this when no ambulance has arrived, using the same sequence that NHS guidance gives: 1 puff every 30 to 60 seconds, up to 10 puffs.
6. Call 998 when the reliever is not working. Say asthma attack when you call and give the address. Do not drive yourself, and keep the inhaler beside you while you wait.

Done looks like this: you can finish a sentence in one breath, the whistle has gone, and the tightness has loosened. The mistake at step 2 is stopping after a puff or two to see whether it settles, because the ten-minute check only means something once the full dose has been taken.

For a child, both the dose and the order of the steps come from the child's own plan, so follow that plan where it differs; the practice's paediatric care page covers assessment for children. The figures here come from guidance written around the UK's 999 system, and the number to ring in the UAE is 998. A plan written for you by a clinician may name a different device and a different maximum, and that plan decides where the two disagree.

Warning signs that mean call 998

Some signs take the decision out of your hands. Call 998 if any of them appears, whatever the reliever has already done.

These are pointers, and an attack can look mild and turn within minutes, so a reliever that stops working changes the plan even when the rest of the table is quiet. When you call, name it as an asthma attack and give the address. Do not drive yourself to hospital.

The table covers the attack in front of you. The wider symptom pattern between attacks, and the signs that mean asthma should be assessed, are set out in the adult asthma symptom guide.

After the attack: why a settled attack still needs review

An attack that settles leaves work behind it. NHS guidance asks for a review within two days of it, even after you feel back to normal. That appointment exists to lower the odds of the next one.

At the review, someone watches you use the inhaler, asks how many days a week the reliever comes out, and decides whether spirometry and lung function tests are needed. A consultant assessment also covers the parts of the pattern that a symptom list cannot show.

A normal examination between attacks does not close the question, and a normal spirometry result on a good day does not either. Control is judged over weeks, which is why the reliever count and the night symptoms carry as much weight as the test.

The BTS, NICE and SIGN asthma guideline, published on 27 November 2024, covers long-term management, adherence and self-management, and says plainly that acute attacks sit outside it. That split explains the shape of this page: the first minutes come from emergency guidance, and the follow-up comes from a clinic.

What triggers an asthma attack

The American College of Allergy, Asthma & Immunology puts allergens first: tree, grass and weed pollen, dust mites, cockroaches and animal dander. Irritants in the air form the second group, with smoke and chemical fumes. Strong odours such as perfume make a third.

That list is not exhaustive, and your own set is probably narrower than it. Someone who reacts to dust mites will not necessarily react to pollen, and someone set off by smoke may have no allergy at all. A general list cannot do the work of a history taken at a review.

Attacks often follow a run of smaller symptoms, so a few weeks of notes do more than a memory of the worst night. Write down what happened in the hours before each attack, because two or three entries often name a pattern that one cannot.

Bring the notes to the review. The pattern they show helps decide which tests are worth doing and which triggers are worth planning around.

Preventing the next attack: preventer inhaler and action plan

The daily preventer is the part that lowers risk, and it works on the days it is taken. The BTS, NICE and SIGN guideline makes recommendations on adherence and self-management, and both work better with a written plan. The 2026 GINA strategy report sets out the international strategy for asthma management and prevention, built on a review of the recent literature by an international panel.

A written action plan is the other half. It sets out what to do when the cough starts, what to do when the reliever is needed more often than usual, and when to call 998, in your own words and for your own devices. The steps in the middle of this page are the general version of the last part of that plan.

This week is a good time to check two things: the expiry date on the reliever and whether there is a spare. Write the plan down if it currently lives in your memory. Then watch how often the reliever comes out, because a rise over a week or two is worth raising at a review.

The pulmonology hub covers the rest of the assessment pathway for breathing and lung conditions, asthma included. If the last attack is still unexplained, book an appointment and bring the inhaler you use at home, along with the dates of the attacks.