An asthma attack can go from mild to life threatening faster than people expect, and knowing the right sequence of steps, rather than guessing under pressure, genuinely changes outcomes. The underlying problem is straightforward even though the experience of it is frightening: the small airways in the lungs narrow and spasm, become inflamed, and fill with excess mucus, making it increasingly hard to move air, especially on the way out.
What Triggers an Attack
Common triggers include changes in weather, allergies, upper respiratory infections, exercise, strong emotion or stress, and sometimes no identifiable trigger at all. Someone with known asthma may recognise their own personal triggers well, which is useful information if they are able to tell you.
Recognising an Asthma Attack
Signs range depending on severity. In milder cases you may see a cough develop. In moderate cases, wheezing breath sounds are usually clearly audible, along with rapid breathing and pulse, pale and sweaty skin, and difficulty speaking in full sentences. In severe cases the wheeze may actually become quieter or disappear, alongside visible distress, exhaustion, an altered conscious state, or a complete stop in breathing. A quiet chest in someone who was wheezing loudly minutes ago is a warning sign of worsening, not improvement.
Management If Conscious
- Reassure the person and help them into an upright position, ideally sitting and leaning slightly forward resting on a support such as a table, which makes it easier for the chest to expand.
- If they have their own prescribed reliever medication, help them use it promptly, typically four puffs through a puffer or spacer device, asking them to breathe in and out four times after each puff.
- Wait four minutes. If there is no improvement, repeat the same four puffs.
- If there is still no improvement, call emergency services immediately and state clearly that the person is having an asthma attack. Continue repeating reliever doses every four minutes while waiting for the ambulance to arrive.
Warning Signs of Deterioration
Watch for the person becoming exhausted from the effort of breathing. At this stage they may appear paradoxically calmer, paler and sweatier, while wheezing becomes less audible due to reduced airflow rather than genuine improvement. Any doubt about severity should prompt you to seek urgent medical assistance rather than wait and see.
Management If Unconscious
Clear the airway and follow the standard basic life support flow chart, and seek urgent medical assistance immediately, preferably an ambulance. If rescue breathing becomes necessary during a severe attack, be aware it may require noticeably more force to inflate the lungs, along with a slower rate of inflation to allow trapped air to escape between breaths.
Reliever Versus Preventer Medication
Reliever medications, commonly delivered through a blue or grey coloured inhaler, act quickly to relax the muscle spasm in the airways during an attack, though they do nothing for the underlying inflammation or mucus buildup. Preventer medications work differently, reducing inflammation over time, and typically need two to four weeks of regular use to build up to a therapeutic effect. This is why a preventer inhaler is not useful during an acute attack itself.
Having a Plan Before an Attack Happens
Anyone who lives or works with a person who has asthma benefits from knowing their action plan in advance, including how to assess severity, what their prescribed medication is and how to administer it, and clear criteria for when to call for emergency help rather than waiting.
Frequently Asked Questions
What position helps someone during an asthma attack?
Sitting upright, ideally leaning slightly forward on a support such as a table, which allows easier chest expansion.
How many puffs of reliever medication should be given?
Typically four puffs, waiting four minutes before repeating if there is no improvement, and calling an ambulance if there is still no improvement after that.
Why might wheezing become quieter during a severe attack?
Reduced airflow can make wheezing less audible even as the attack worsens, which can be mistaken for improvement. This is a warning sign, not a good sign.
References and Last Reviewed
- Global Initiative for Asthma (GINA), Global Strategy for Asthma Management and Prevention
- American Heart Association, Guidelines for First Aid
Jurisdiction: General first aid guidance, internationally applicable. Specific reliever medications and inhaler colour coding can vary between countries.
Last technically reviewed: September 2026
Reviewed by: EHS Guidelines Editorial Team
This article is educational and does not replace accredited first aid training or professional medical care. In a real emergency, call your local emergency number immediately.
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