Thank you for taking the time to troubleshoot this with me!
I do not do breathing exercises, never considered doing some tbh. I usually just immediately run with no warm-up. I remember having had less to no problems with my asthma during runs, when I was younger, thus I have an image of a normal way to run, which is modeled after my young adulthood. That is probably one of my mistakes now that I am older.
The lung pain occurs in the lower lungs and doesn't happen in other situations than running/jogging/sprinting.
Humidity might be a possibility, but I have the same problem during high summer as well as deep winter. I live in a temperate climate zone.
Your questions bring back an idea that I had some time ago, which was, that I might not use my full lung volume, when breathing normally, and that, when I am running, I might take deeper breaths accessing the lower lung volume, where the inflammation of the asthma may be more severe (?) thus causing pain? Unfortunately I do not remember if a gasping breath didn't reduce/alleviate the pain or if I just didn't find this the right way to breath, when running.
Jogging slower helps, but I think, that is more due to me breathing more normally.
Your approach makes me want to measure the on-set, frequency and context of my asthma pain during runs and come back to you in a couple months to share my insights with you! :D
I am sorry, I forgot to specify that the pain comes from breathing. It's not making breathing difficult enough to make me stop running because of that, it really is more the pain from breathing that makes me stop. And I do not experience pain, when holding my breath and running.
Since I have asthma, it's the first culprit to suspect, but you are right, I should talk with a health professional about this. It just seemed so normal to me by now, that I didn't consider it a health issue and more a nuisance.
Thank you for your input and making me realize that this might not be normal despite having asthma!