Hello..Just ask your GP or Respertologist for a blood test for eosinophilic asthma...just like they check your cholesterol levels this checks your eosinophilic levels...they can also do a sputum test where you spit in a sample jar....It is referred to e-asthma and you can google it but it is when the eosinophilics attack your airways and cause them to swell so you cannot breathe. Most puffers do not help this type of asthma and you need what is called a biologic. I am on once called Fascenra and it is by self injection every 2 months.. many people do not use puffers at all once they know and just use the biologic..hope this helps..It has made a world of difference for me by increasing my lung function by 20%..unfortunately the airways are permanently damaged due to being diagnosed for years with COPD which I never ever smoked but of course non smokers can get it too.