What are the symptoms of increased lung markings?

Increased lung markings may be caused by long-term smoking, or by some lung diseases, such as bronchitis, pulmonary edema, bronchiectasis, etc. If it is caused by long-term smoking, symptoms such as cough and expectoration may occur. If it is caused by lung diseases, increased lung markings may cause breathing difficulties, cough, asthma, expectoration, etc.