Hi there, I m a 22 year old asthmatic male, for the past at least 5 years, maybe longer I ve had strange fluttering on the top left of my chest, above the heart but it feels like its above the rib cage/just under my skin. It doesn t always happen, but when it happens it s always when I exhale nearly all the air from my lungs or if I laugh for an extended period of time. There is no pain or discomfort with it, just feels strange. I ve seen doctors before and nothing wrong was found.