Hi, my husband is suffering from severe dry cough since last 20 days. He is a smoker from teen age. And his father had a death due to cancer. Sometimes the cough is worsen and he is having problem in inhale. It's difficult for him to inhale through nose due to nose jam and inhale through mouth causes cough. He is having a runny nose these days. From last some days he is saying he is having little blood in cough. Can u plz advice to which specialist should I consult.