How do you tell the difference between a flu and a cold? Experts suggest taking your temperature. In most situations a cold won’t raise one’s body temperature more than a couple degrees. However, a flu will typically raise one’s body temperature well above 100 degrees Fahrenheit. This fever can also last several days.
That’s why it’s a good idea to have a thermometer handy during the cold season. You can acquire one at most pharmacies or department stores.