Vapes and e-cigarettes when you have a lung condition

Find out what vaping is, how it can help you quit smoking, and how it affects your lungs.

Non-urgent advice: Disclaimer

This page explains what we know so far about how legal vapes affect your health when you have a lung condition.

Although we know that using legal nicotine vapes is much safer than smoking, the NHS is clear that children and non-smokers should never vape. Vaping is not risk free and we need more research to understand the long-term risks, as well the effects of nicotine separate from smoking.  

You can see some of the key references we used at the bottom of the page.

What is vaping?

Vaping is when you use an electronic device called a vape to inhale vapour rather than smoke. Vapes are sometimes called electronic cigarettes or e-cigarettes.

Is vaping harmful?

Although research into the long-term effects of vaping is still ongoing, current evidence shows that vaping is much less harmful than smoking. But vaping is not risk free, and clean air is always best for your lungs. That’s why we do not recommend vaping for children, young people, or people who do not smoke.

Dr Matthew Swallow, Asthma + Lung UK’s Clinical Lead

The evidence says that vaping is less harmful for your lungs and overall health than smoking tobacco in the short term.  

This is because vapes do not burn tobacco or produce smoke, so you’re exposed to much lower levels of harmful chemicals like tar and carbon monoxide than smoking.  

We need more research about the long-term effects of vaping on lungs and overall health, including studies in people that have never smoked.  

The Royal College of Paediatrics and Child Health reviewed evidence on the impact of vaping in children and young people. This review found that in the short and medium-term, there are links between vaping and a higher risk of lung symptoms like coughing, as well as struggling with mental health and smoking tobacco.

It’s possible that long-term vaping can cause inflammation in the airways, which may cause harm over time.    

The way that vaping affects your lungs depends on your smoking history. In people who do not smoke, vaping is likely to cause more harm than not vaping at all. Nicotine vaping can also be addictive and cause withdrawal symptoms when you try to stop. This is why the NHS says it’s important that vapes are only used by people who are trying to quit smoking.  

If you have a lung condition and are vaping to stop yourself from smoking, it’s a good idea to stop vaping eventually. But it’s important to make sure that quitting vaping is the right option for you, in order to make sure that you don’t go back to smoking. Find out more about quitting vaping, including if it’s right for you.  

There’s a lot of information about vaping and it can be difficult to know what to trust. Find out more about:

Always ask a healthcare professional, like your pharmacist, if you have any questions. You do not need an appointment to speak to a pharmacist.

How can vaping affect my lung condition?

There is not much research about how vaping can affect people with lung conditions. But switching to vaping may improve symptoms for some people compared to carrying on smoking.

Some people with lung conditions tell us that vaping and second-hand vapour can trigger their symptoms. This is because breathing in the chemicals in the vapour may trigger your lung symptoms in a similar way to air pollution, cold weather, dust, or pollen. Speak to your GP or nurse if this is the case.

Everybody is different. It’s important to be aware of what can trigger your symptoms to reduce your risk of having an asthma attack or flare-up. 

Find out about: 

You could use our symptom diary to record to your day-to-day symptoms. Understanding your usual symptoms could help you notice whether any patterns or changes in your symptoms are related to particular triggers.

Important: Do not vape when you're using home oxygen therapy

It’s very dangerous to smoke or vape when you’re using home oxygen therapy because it’s a fire risk to yourself and others. 

If you’re prescribed home oxygen therapy, talk to your healthcare professional about how to use it safely. For example, they may suggest you stop using oxygen for at least five minutes before vaping, and that you charge your vape in a different room to your oxygen supply.

Vaping and ‘popcorn lung’

People sometimes worry that vapes can cause a condition called bronchiolitis obliterans, known as ‘popcorn lung’. The flavouring chemical diacetyl that is thought to cause this condition is banned in vapes in the UK.

Second-hand vaping

The impacts of breathing in vapour from someone else’s vape (second-hand or passive vaping) are still unclear. Because of this, the NHS says that it’s best to avoid vaping around children if you can. 

But so far, experts believe that vapour from vapes is not as harmful as tobacco smoke. This is because the vapour does not contain tar and carbon monoxide, which are the most dangerous substances in tobacco smoke. Even though the vapour does contain some chemicals, like nicotine, and some toxins, these are at extremely low levels.  

The impacts of second-hand vaping may depend on things like the type of vape, how long you’re exposed for, and if the vapour is inside or outside.

Using vapes to stop smoking

Demonstration of the impact of smoking vs vaping, Public Health England, 2018

Nicotine vapes can be a very effective way to stop smoking.  

Nicotine vapes were initially created as a safer way for people to get nicotine instead of cigarettes. They're the most common tool to help people quit smoking in England and are recommended by the NHS for this purpose.  

While nicotine is an addictive chemical, nicotine itself causes little physical harm and it’s in lots of medicines that help people to quit smoking. Most smoking-related health conditions are caused by other harmful chemicals in tobacco smoke, not by nicotine. We need more research about the effects of nicotine separate from smoking.

You’re more likely to quit successfully with a vape if you’re also using other forms of nicotine replacement therapy (NRT) and have support from stop smoking services.

To stop smoking, it’s important to find what works for you. Vapes may work for some people, but that does not mean they’ll work for you. For example, some people tell us that that vaping, or even second-hand vaping, triggers their asthma. Some people experience side effects like a headache or their throat and mouth being irritated when they first start vaping, but these usually get better over time.  

When you first start vaping to quit smoking, it’s common to feel like you’re vaping more frequently than you used to smoke. This is because vapes often have lower levels of nicotine than cigarettes, and it also takes longer for the nicotine to reach your brain. Talk to a healthcare professional if you’re worried about how much you’re vaping. They may suggest increasing the concentration of nicotine in your vape or using other NRT.  

To get the most health benefits, it’s important to completely switch from smoking to vaping, and then plan to quit vaping in the long term.

Stop smoking services can support you if you use vapes to quit smoking. They can give you advice about what vape and nicotine strength may be best for you and make sure you’re always getting safe, legal vapes.

The NHS also has more information about vaping to quit smoking.

Choosing a vape

There are lots of different types of vapes and it can be difficult to know which ones are safe and what’s best for you.

While vapes are regulated in the UK, no vapes are currently licensed as medicines. This means they can’t be prescribed by the NHS.

To keep yourself safe, only ever buy legal vapes. The Medicines and Healthcare products Regulatory Agency (MHRA) checks all legal vapes to make sure they follow strict rules, quality and safety standards. This includes what can go into vape liquid and how much nicotine they can have.

Single-use, disposable vapes have been banned in the UK since June 2025. Buying illegal vapes is risky because they're not checked for safety and quality.

Make sure you only get vapes from sellers you trust and always ask your healthcare professional if you’re unsure.  

Find out more about how to check if a vape is legal from the charity Change Grow Live.

It's important to only use legal, regulated nicotine-containing vapes. Some of the serious harms linked to vaping have involved unregulated products or products containing other substances, such as THC (tetrahydrocannabinol) which comes from cannabis plants.

Dr Matthew Swallow, Asthma + Lung UK’s Clinical Lead

Find out more

Asthma + Lung UK

How to quit vaping when you have a lung condition

Find out how to safely quit vaping when you have a lung condition, how to manage nicotine withdrawal symptoms, and what support is available to you.
Person typing

About our health information

Learn more about how we make sure our health information is accurate, up-to-date and easy to use.

All our information is reviewed and updated by Asthma + Lung UK’s experienced Health Advice Team. People living with lung conditions, qualified healthcare professionals and specialists also review our content.

This information has been clinically reviewed and approved by Asthma + Lung UK’s Clinical Lead, Dr Matthew Swallow, a practising GP.

Our information is based on the latest, trustworthy evidence and guidelines. Below is a sample list of the sources referenced in our vaping information.

  • National Centre for Smoking Cessation and Training (NCSCT), Supporting clients who want to stop vaping, February 2026
  • NCSCT, Vaping: a guide for health and social care professionals, January 2025
  • McNeill et al. (for the Office for Health Improvements and Disparities), Nicotine vaping in England: an evidence update including health risks and perceptions, September 2022 - GOV.UK, September 2022
  • Royal College of Physicians (RCP), E-cigarettes and harm reduction: An evidence review | RCP, April 2024

If you'd like a full list of the sources we've used to produce our health information, you can email us at healthadvicequeries@asthmaandlung.org.uk. 

Get support

Call or email our helpline for support with any aspect of living with a lung condition – whether you need practical advice, emotional support, or answers to health-related questions. You can also find support through our groups.

Did you find this information useful?

We use your comments to improve our information. We cannot reply to comments left on this form. If you have health concerns or need clinical advice, call our helpline on 0300 222 5800 between 9am and 5pm on a weekday or email them.

Page last reviewed:
Next review due: