Home remedies such as mustard plasters can help clear mucus. I'm sure there are other cultural equivalents out there, but my grandmother swore by these: 


4 tablespoons flour 
2 tablespoons dry mustard 
Water (lukewarm) 
Cheesecloth or really any fabric or material that you don't plan on keeping. Save yourself some effort and measure surface area to be covered before applying mustard paste.  


- Mix the dry ingredients together and then add water to make a paste. The paste should be smooth & easily spreadable - but not so thin that it runs or is watery. 
- Take your fabric and spread the paste evenly across half of one side. Fold up the bottom half of the fabric and apply to the chest. DO NOT APPLY PASTE DIRECTLY TO THE SKIN or it may cause blistering.

- Cover with a fresh towel, then top with a heavy blanket to encourage sweating (the fresh towel protects the blanket from any staining). 

- Leave plaster on for up to 20 minutes. REMOVE IF SKIN TURNS DEEP RED AND IS IN DANGER OF BLISTERING. IF USING ON A CHILD, WATCH TENDER SKIN CAREFULLY (this is not to be used on children under school age unless directed by a doctor). Some reddening is normal as heat and circulation is being drawn to the surface. 

- Remove poultice, wash skin with a warm cloth to remove any traces that may have seeped through. Apply Vaseline or an oil to help calm the angry skin afterwards. 

- Next, apply to the back for the same amount of time (OR UNTIL DANGER OF BLISTERING APPEARS), again covering with a heavy blanket and following the procedure above. 

- This can be reapplied every 4-6 hours as needed.