A cold and the flu are caused by different viruses, but can have similar symptoms, so it can be hard to tell them apart. Flu usually comes on a lot quicker than a cold, which can develop over a few days.
The flu usually has more severe symptoms than a cold too, as listed above. With a cold, you’ll usually only have a runny or blocked nose, a sore throat, sneezing, headaches and sometimes a cough.
The flu can also have serious complications, whereas a cold usually doesn’t have any lasting effects.