Another asthmatic here. Had it all my life and it is environmentally triggered. I also have scarring from pneumonia and some asbestos exposure as a kid. I am also allergic to most pollens, animals, dust etc. I religiously use Symbicort daily and carry it along on longer rides. I have always found the best defence is a strong offence so I use eye drops, sinus spray and the puffer before I head out. In cooler temps, I will start by pulling a bandana over my mouth during hard pulls and step it up to a lower face balaclava as the temperatures drop. Good luck controlling your condition.