About a year ago my left lung collapsed. The injury causing the collapse occurred early on Wednesday morning. I went to the emergency room late Friday evening where the 100% collapse was diagnosed. It was Sunday evening before they got the lung to reinflate above about 50%. I now have breathing problems that I had never experienced before. Any physical exertion beyond a moderate walking pace, exposure to smoke,perfumes, or strong smells of any kind, temperature extremes, hot or cold, and exposure to chlorine (in an indoor pool area) are among the things that cause shortness of breath, a rather dry, barking cough and a generally oppressive, sick feeling. I sometimes feel lightheaded and my fingers get tingly and numb for no apparent reason. I have been tested for asthma, allergies and heart problems since the onset of the symptoms, and so far no diagnosis has been made. Albuterol helps, although not totally eliminates, the symptoms of the more acute attacks. I have read vague, anecdotal references to the build up of scar tissue in patients as the result of this type of injury, and am wodering if there is anything to this. Would it cause these symptoms? How would a diagnosis be made? Does it eventually heal? Any information I can get would be appreciated.