Mucus is also called as phlegm that gets accumulated in the throat. Mucus is thick water like substance taking various colors with respect to the cause of the disease and has to be expelled out of throat. Mucus is produced in the windpipe or trachea. Phlegm means inflammation in Greek. The presence of mucus irritates the windpipe and causes great discomfort and the person feels relieved only after he coughs up mucus.
The color of the mucus is white or colorless. There are several reasons for the formation of mucus. Similarly the color of the mucus can be yellow, brown, black or bloody red and even pink. Often, your doctor will ask for color of the mucus to determine for making right diagnoses.
Coughing up clear mucus is nothing to worry and it can be due to irritation in the respiratory tract.
Diagnoses :
Depending on the symptoms your doctor may order for blood test, sputum test, ECG, CT scan and even chest X-ray. He needs to complete these tests to rule out any chance of having TB.