what color is sputum in copd
A profuse amount of clear sputum should therefore be considered as abnormal. 1  Pulmonary edema (fluid in the lungs) â clear, white or pink frothy sputum. 2  Viral respiratory tract infections â clear to white (acute). 3  Chronic bronchitis (COPD) â clear to gray.4  Asthma â white to yellow (thick).rown or black sputum is an indication of âold bloodâ and the color may be due to the breakdown of red blood cells thereby releasing hemosiderin (from hemoglobin). Certain organic and non-organic dusts may also cause a brown to black discoloration of the sputum.