Mucus serves as a trapping agent for all sorts of foreign particles taken into our bodies, says Meltzer. It coats the surfaces of the upper respiratory tract and serves as a barrier to prevent penetration of bacteria and virus particles down to the cellular surface. You can t do anything about the virus but let nature take its course. Lots of rest and fluids, such as hot tea, juice, water and soup will give your body a chance to defeat the virus and help you feel better. Part of the reason your doctor tells you to drink plenty of fluids during a cold or flu is to prevent dehydration, says Meltzer.
Dehydration causes mucus to become very thick, which is what leads to feelings of congestion.
You re not only clogged up but also your body has a limitation in its ability to clear this heavier form of mucus, with all the trapped bacteria and viruses within. It makes the victim of a cold or flu feel like he is loved and comforted, says Meltzer. In addition to helping you stay hydrated, he says, the steam moistens respiratory passages, helping make the mucus thinner and therefore more easily cleared. Some people notice that diary products make their bodies produce more mucus. If you re one of those people, stay away from cream-based soups, as well as products such as milk and ice cream while you re sick.