Asthma — understanding your treatment
Reviewed by the My London Pharmacy clinical team, Zaynab Ali, Pharmacist Independent Prescriber
·29 July 2026
·7 min read
Quick answer
Asthma treatment usually combines a reliever inhaler for immediate symptoms with a preventer inhaler used daily to calm airway inflammation. Good inhaler technique, a written action plan and regular reviews help most people keep symptoms controlled and reduce the risk of attacks.
What asthma is and how it affects breathing
Asthma is a common long-term condition that affects the airways carrying air in and out of the lungs. In people with asthma, these airways are more sensitive than usual and can become inflamed and narrowed when exposed to certain triggers, such as dust, pollen, cold air, viral infections or exercise. The lining of the airways can swell, the surrounding muscle can tighten, and extra mucus can be produced. Together these changes make it harder for air to move freely, which is what produces the familiar symptoms of wheezing, coughing, chest tightness and breathlessness.
Symptoms vary from person to person and can change over time. Some people notice them only occasionally, while others experience them most days, and many find they are worse at night or early in the morning. Because asthma is variable, the aim of treatment is not a single quick answer but ongoing control, so that symptoms are infrequent and everyday activities are not limited. Asthma affects millions of people in the UK, and with the right treatment and support the large majority live full, active lives. Understanding how your treatment fits together makes it easier to stay well and to recognise when something needs attention.
Recognising your triggers
One of the most useful things you can do is learn what tends to set off your symptoms, because avoiding or preparing for triggers is a practical part of good control. Triggers differ from person to person, and many people have more than one. Keeping a simple note of when symptoms appear can reveal patterns that are easy to miss day to day.
- Allergens such as house dust mites, pollen, animal fur and mould.
- Respiratory infections, including common colds and flu.
- Cold air, sudden changes in weather, and air pollution or smoke.
- Exercise, particularly in cold conditions, which does not mean avoiding activity but preparing for it.
- Certain medicines, strong smells, and for some people stress or strong emotions.
Knowing your triggers helps you and your clinician tailor treatment. It also means you can take sensible steps, such as managing hay fever in pollen season or keeping warm in cold weather, without letting asthma limit the things you enjoy.
How asthma treatment is designed to work
Asthma care in the UK follows guidance from NICE and the British Thoracic Society, and is built around two ideas: relieving symptoms quickly when they occur, and preventing inflammation so symptoms happen less often. Most treatment is delivered by inhalers, which send medicine directly to the airways where it is needed, keeping doses low and side effects limited compared with tablets.
Your clinician will usually start with the lowest level of treatment likely to keep you well, then adjust up or down at review depending on how controlled your symptoms are. Good control generally means no daytime symptoms, no night-time waking, no limits on activity and little or no need for your reliever inhaler. If you are using your reliever often, that is an important signal to have your treatment reviewed rather than simply relying on it more. Treatment is stepped up when control is poor and can sometimes be stepped down when things have been settled for a while, always under clinical guidance.
Relievers, preventers and combination inhalers
Reliever inhalers (often blue) work within minutes to relax the muscles around the airways and ease sudden symptoms. They are important for immediate relief but do not treat the underlying inflammation, so needing them frequently suggests your asthma is not fully controlled and that your preventer treatment may need attention.
Preventer inhalers usually contain a low dose of inhaled steroid that gradually reduces inflammation and airway sensitivity. They are taken every day, even when you feel well, and typically take a couple of weeks to reach their full effect, so it is important to keep using them rather than stopping when symptoms settle. Combination inhalers bring a preventer and a longer-acting reliever together in one device for people who need additional control. Some newer approaches use a single combination inhaler for both daily prevention and symptom relief, which your clinician can explain if it suits you. Whichever type you use, consistency matters, and a review is the place to change your regimen.
Getting the most from your inhaler
Even the right medicine works poorly if the inhaler is not used correctly, and studies consistently show that many people make small errors that reduce the dose reaching the lungs. It is well worth asking your pharmacist or practice nurse to watch your technique, as a brief check can make a real difference to how well your treatment works and how often you have symptoms.
- Prepare and shake the device as directed before each dose.
- Breathe out gently, then start a slow, steady breath in as you release the dose.
- Hold your breath for around ten seconds where you can, to let the medicine settle in the airways.
- Use a spacer with a metered-dose inhaler if one is recommended, especially for preventer medicines, as it helps more of the dose reach the lungs.
- Rinse your mouth after inhaled steroids to lower the chance of thrush-causes-and-treatment">oral thrush and a hoarse voice.
Keeping track of how much is left in your inhaler, and reordering in good time, means you are never caught without your treatment.
Your personal asthma action plan
A written asthma action plan sets out your regular treatment, how to recognise when symptoms are worsening, and exactly what to do at each stage. Evidence shows that people with a personalised plan are less likely to need urgent care, because they act early rather than waiting for symptoms to escalate. Your plan is agreed with your clinician and can be updated at each review to reflect how your asthma is behaving.
Regular reviews, usually at least once a year, are a chance to check control, revisit your technique, and adjust treatment. They are also an opportunity to talk about anything that has changed, such as new triggers, a recent chest infection, or difficulty keeping up with your inhalers. Keeping track of your triggers, symptoms and reliever use between appointments gives your clinician useful information to work with. If your circumstances change, a clinician can advise on what may be suitable for you, and it is always reasonable to ask for a review sooner if things are not going well.
When to seek urgent help
Most asthma is managed well day to day, but it is important to recognise the signs of an attack. Seek urgent medical help if your reliever is not helping or you need it more than every four hours, if you are too breathless to speak, eat or sleep, if your breathing is getting faster, or if your symptoms are worsening quickly. Call 999 for emergency help if you feel very unwell, and keep using your reliever while you wait.
After any attack, arrange a review so your treatment can be reassessed, because an attack often means your everyday control needs strengthening. Between times, do not ignore a gradual increase in symptoms or reliever use, as these changes often come before a flare and are easier to manage when caught early. Speaking to a clinician promptly, rather than waiting to see if things settle, gives the best chance of keeping your asthma calm and your daily life uninterrupted.
Living well with asthma is largely about the everyday basics done consistently: taking your preventer as prescribed, keeping your technique sharp, knowing your triggers, and having a clear plan for when symptoms change. With these in place, most people are able to work, exercise and get on with life with little interruption. If anything about your asthma is worrying you, or you are simply not sure whether your control is as good as it could be, a review is always a reasonable next step.
Frequently asked questions
Is asthma a lifelong condition?
For many people asthma is long-term, though symptoms can improve or become less frequent over time. Regular reviews help keep treatment matched to your current needs.
What is the difference between a reliever and a preventer inhaler?
A reliever eases sudden symptoms within minutes, while a preventer is taken daily to reduce airway inflammation and lower the chance of symptoms. Most people who need regular treatment use both.
Why am I using my reliever inhaler so often?
Needing a reliever several times a week usually means your asthma is not fully controlled. It is a good reason to book a review so your treatment can be reassessed.
Do inhaled steroids have serious side effects?
Preventer inhalers use low doses delivered directly to the airways, so side effects are usually limited. Rinsing your mouth after use helps prevent oral thrush and a hoarse voice.
Can I still exercise if I have asthma?
Yes. With good control most people exercise freely. If activity triggers symptoms, speak to a clinician, as this often signals that your treatment needs reviewing rather than that you should stop.
When should I seek emergency help?
Seek urgent help if your reliever is not working, you are too breathless to speak or sleep, or your symptoms are worsening quickly. Call 999 if you feel very unwell.