I am coughing for a few weeks. My trachea and bronchi feel itchy. My x-ray result show two shadow. One is about 5cm. The other is about 3 cm. I have a history of having a lot of mucus and green and yellow spit. Recently when I wake up in the morning the spit after I cough show a little red spot. At night time, sometime I have a little shortness of breath. It seem like I don't get enough oxygen for each breath. What kind of lung disease is that? Due to what infection? What medical treatment do I need? My Doctor now treat it as pneumonia and give me Ran-Clarithromycin 500mg.Thank you for your help.