hi,, i am sridhar from chennai....sir i used to smoke maximum 5 cigarette per day....for last 6 month,developed the dry cough during when i laugh and during night time..and frequent morning burst before the time when i wake up for last month i consulted the doctor for morning burst, he insist the ultra scan for abdomen.. lung,kidney were normal... i worried about the dry cough ...please give ur valuable consulation......