When you wake up sneezing, coughing, and have that achy, feverish, can't move a muscle feeling, how do you know whether you have cold symptoms or the flu? And if it's the flu, could it be swine flu?

It's important to know the difference between flu and cold symptoms. A cold is a milder respiratory illness than the flu. While cold symptoms can make you feel bad for a few days, flu symptoms can make you feel quite ill for a few days to weeks. The flu -- whether it's typical seasonal flu or the swine flu virus -- can also result in serious health problems such as pneumonia and hospitalizations.