PHLEGM IS.......
Phlegm is a sticky material from your mucous membranes in your repiratory system. When you have a cold it might be yellowish brown. If there's an infection, it might be greenish...
You can try taking an oral expectorant-type cough medicine. Expectorants are substances that promote coughing rather than suppressing it, in order to bring out phlegm from the bronchia.