"A cold can disappear in two days. Seventy percent of people who catch a cold feel better within a week, so it is unusual to have the common cold for as long as two weeks, says Gary Rogg, a medicine specialist(专家)at Montefiore Medical Center in New York.
Why does your cold stay for longer than it should? Here are some possible reasons.
Getting Less Sleep
Sleep plays an important role in our system. In fact, a study has proved that people who get less than seven hours of sleep per night are nearly three times more likely to catch a cold than people who sleep for eight hours or more.
Low on Water
Water plays an important part in your body. If your cold doesn't go away, you'll consider drinking more water.
Treating the Illness Wrongly
The common cold can easily be mixed with other illnesses. People often believe they've had a cold for a few weeks and may not realize that they aren't getting better because they've been treating the illness wrongly.
Exercising Too Hard
"People ask me all the time, 'Should I exercise when I have a cold?'" Katona says. "My answer is usually yes, but people should do it at a low level. If you do it at a high level, you may get even worse."
So, what is Katona's low level? The answer is taking a walk instead of running five miles.
