It stated about 2 year ago occurs once or twice a month, for 3to4 days but it is persistent from last 2 weeks I have a medical history of breathing issues. Father has sleeping apnea and mother has asthma. I suffered from asthma in childhood, I am 32 now and my weight is 81. My symptoms are: labored breathing while sleeping light pain in chest while deep breathing breathlessness while climbing stairs cough with mucus in the morning. I go through ct scan, x-ray test (last month) but doctor said nothing is diagnosed. I am doing all routine properly, but can not do any physical activity, walking fast make breathlessness. I stated smoking in 2010 and quit it last week. More details about the presenting complaint: used to smoke. Not smoking since last week. Suffered from asthma in childhood used to jog for almost 5 to 8 km (3 years ago), can not run 100 meters because of breathlessness. Previous history of the same issue: suffered from same issue but not that much long. Cured automatically. Current medications: nil past medications of the same issue: general flu medication. Lab tests performed: nothing diagnosed in ct scan and x ray height, weight height weight 5' 10" (177.8 cm)180 lbs (81.65 kg)