How can i get rid of a chest cough as quickly as possible?

Technically you can not "treat" a cough. All the cough syrup does is suppress the cough, which can do the opposite of what you want....last longer. Putting a humidifier in your room will help bring the cough up and out. The phlegm is really gross, but if it stays put then it will last longer. If you cough it up then it's leaving your system as it should. Your body coughs because it wants it out. Gross I know but there ya go.