A cough is actually a good thing. It is your body’s way of moving the phlegm out and keeps it from settling on your lungs. If you take a cough medicine, use one with an expectorant to help thin and clear the mucus. Drink lots of fluids! This will also help. See your doctor if you cough worsens, lasts more than a few days, is accompanied by fever, or gets better and then becomes worse again.