Question: what to do when you feel chest cold coming on?
Answer: Don't Over-Exert Yourself. When you're starting to feel sick, this is not the time to run a few miles or pull an all-nighter for a big project. ... 
Over the Counter Medicines Can Help. ... 
Avoid Cold and Damp Environments. ... 
Get Enough Sleep. ... 
Drink Plenty of Fluids.